setup babel

3 files changed, 1126 insertions, 3 deletions

diff --git a/gulpfile.js b/gulpfile.js
index c690f3a..ec2191b 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -1,6 +1,7 @@
 const gulp = require('gulp')
 const zip = require('gulp-zip')
 const sass = require('gulp-sass')
+const babel = require('gulp-babel')
 const qunit = require('gulp-qunit')
 const header = require('gulp-header')
 const eslint = require('gulp-eslint')
@@ -24,6 +25,7 @@ const license = `/*!
 */\n`
 
 gulp.task('js', () => gulp.src(['./js/reveal.js'])
+        .pipe(babel({ presets: ['@babel/preset-env'] }))
         .pipe(uglify())
         .pipe(header(license, {pkg: pkg}))
         .pipe(rename('reveal.min.js'))
diff --git a/package-lock.json b/package-lock.json
index b9bbf77..4d25db8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,6 +13,336 @@
         "@babel/highlight": "^7.8.3"
       }
     },
+    "@babel/compat-data": {
+      "version": "7.8.6",
+      "resolved": "https://registry.npmjs.org/@babel/compat-data/-/compat-data-7.8.6.tgz",
+      "integrity": "sha512-CurCIKPTkS25Mb8mz267vU95vy+TyUpnctEX2lV33xWNmHAfjruztgiPBbXZRh3xZZy1CYvGx6XfxyTVS+sk7Q==",
+      "dev": true,
+      "requires": {
+        "browserslist": "^4.8.5",
+        "invariant": "^2.2.4",
+        "semver": "^5.5.0"
+      }
+    },
+    "@babel/core": {
+      "version": "7.8.7",
+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.8.7.tgz",
+      "integrity": "sha512-rBlqF3Yko9cynC5CCFy6+K/w2N+Sq/ff2BPy+Krp7rHlABIr5epbA7OxVeKoMHB39LZOp1UY5SuLjy6uWi35yA==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.8.3",
+        "@babel/generator": "^7.8.7",
+        "@babel/helpers": "^7.8.4",
+        "@babel/parser": "^7.8.7",
+        "@babel/template": "^7.8.6",
+        "@babel/traverse": "^7.8.6",
+        "@babel/types": "^7.8.7",
+        "convert-source-map": "^1.7.0",
+        "debug": "^4.1.0",
+        "gensync": "^1.0.0-beta.1",
+        "json5": "^2.1.0",
+        "lodash": "^4.17.13",
+        "resolve": "^1.3.2",
+        "semver": "^5.4.1",
+        "source-map": "^0.5.0"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "4.1.1",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
+          "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
+          "dev": true,
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        },
+        "ms": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==",
+          "dev": true
+        }
+      }
+    },
+    "@babel/generator": {
+      "version": "7.8.7",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.8.7.tgz",
+      "integrity": "sha512-DQwjiKJqH4C3qGiyQCAExJHoZssn49JTMJgZ8SANGgVFdkupcUhLOdkAeoC6kmHZCPfoDG5M0b6cFlSN5wW7Ew==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.7",
+        "jsesc": "^2.5.1",
+        "lodash": "^4.17.13",
+        "source-map": "^0.5.0"
+      },
+      "dependencies": {
+        "jsesc": {
+          "version": "2.5.2",
+          "resolved": "https://registry.npmjs.org/jsesc/-/jsesc-2.5.2.tgz",
+          "integrity": "sha512-OYu7XEzjkCQ3C5Ps3QIZsQfNpqoJyZZA99wd9aWd05NCtC5pWOkShK2mkL6HXQR6/Cy2lbNdPlZBpuQHXE63gA==",
+          "dev": true
+        }
+      }
+    },
+    "@babel/helper-annotate-as-pure": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.8.3.tgz",
+      "integrity": "sha512-6o+mJrZBxOoEX77Ezv9zwW7WV8DdluouRKNY/IR5u/YTMuKHgugHOzYWlYvYLpLA9nPsQCAAASpCIbjI9Mv+Uw==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-builder-binary-assignment-operator-visitor": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-builder-binary-assignment-operator-visitor/-/helper-builder-binary-assignment-operator-visitor-7.8.3.tgz",
+      "integrity": "sha512-5eFOm2SyFPK4Rh3XMMRDjN7lBH0orh3ss0g3rTYZnBQ+r6YPj7lgDyCvPphynHvUrobJmeMignBr6Acw9mAPlw==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-explode-assignable-expression": "^7.8.3",
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-call-delegate": {
+      "version": "7.8.7",
+      "resolved": "https://registry.npmjs.org/@babel/helper-call-delegate/-/helper-call-delegate-7.8.7.tgz",
+      "integrity": "sha512-doAA5LAKhsFCR0LAFIf+r2RSMmC+m8f/oQ+URnUET/rWeEzC0yTRmAGyWkD4sSu3xwbS7MYQ2u+xlt1V5R56KQ==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-hoist-variables": "^7.8.3",
+        "@babel/traverse": "^7.8.3",
+        "@babel/types": "^7.8.7"
+      }
+    },
+    "@babel/helper-compilation-targets": {
+      "version": "7.8.7",
+      "resolved": "https://registry.npmjs.org/@babel/helper-compilation-targets/-/helper-compilation-targets-7.8.7.tgz",
+      "integrity": "sha512-4mWm8DCK2LugIS+p1yArqvG1Pf162upsIsjE7cNBjez+NjliQpVhj20obE520nao0o14DaTnFJv+Fw5a0JpoUw==",
+      "dev": true,
+      "requires": {
+        "@babel/compat-data": "^7.8.6",
+        "browserslist": "^4.9.1",
+        "invariant": "^2.2.4",
+        "levenary": "^1.1.1",
+        "semver": "^5.5.0"
+      }
+    },
+    "@babel/helper-create-regexp-features-plugin": {
+      "version": "7.8.6",
+      "resolved": "https://registry.npmjs.org/@babel/helper-create-regexp-features-plugin/-/helper-create-regexp-features-plugin-7.8.6.tgz",
+      "integrity": "sha512-bPyujWfsHhV/ztUkwGHz/RPV1T1TDEsSZDsN42JPehndA+p1KKTh3npvTadux0ZhCrytx9tvjpWNowKby3tM6A==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-annotate-as-pure": "^7.8.3",
+        "@babel/helper-regex": "^7.8.3",
+        "regexpu-core": "^4.6.0"
+      },
+      "dependencies": {
+        "regexpu-core": {
+          "version": "4.6.0",
+          "resolved": "https://registry.npmjs.org/regexpu-core/-/regexpu-core-4.6.0.tgz",
+          "integrity": "sha512-YlVaefl8P5BnFYOITTNzDvan1ulLOiXJzCNZxduTIosN17b87h3bvG9yHMoHaRuo88H4mQ06Aodj5VtYGGGiTg==",
+          "dev": true,
+          "requires": {
+            "regenerate": "^1.4.0",
+            "regenerate-unicode-properties": "^8.1.0",
+            "regjsgen": "^0.5.0",
+            "regjsparser": "^0.6.0",
+            "unicode-match-property-ecmascript": "^1.0.4",
+            "unicode-match-property-value-ecmascript": "^1.1.0"
+          }
+        },
+        "regjsgen": {
+          "version": "0.5.1",
+          "resolved": "https://registry.npmjs.org/regjsgen/-/regjsgen-0.5.1.tgz",
+          "integrity": "sha512-5qxzGZjDs9w4tzT3TPhCJqWdCc3RLYwy9J2NB0nm5Lz+S273lvWcpjaTGHsT1dc6Hhfq41uSEOw8wBmxrKOuyg==",
+          "dev": true
+        },
+        "regjsparser": {
+          "version": "0.6.3",
+          "resolved": "https://registry.npmjs.org/regjsparser/-/regjsparser-0.6.3.tgz",
+          "integrity": "sha512-8uZvYbnfAtEm9Ab8NTb3hdLwL4g/LQzEYP7Xs27T96abJCCE2d6r3cPZPQEsLKy0vRSGVNG+/zVGtLr86HQduA==",
+          "dev": true,
+          "requires": {
+            "jsesc": "~0.5.0"
+          }
+        }
+      }
+    },
+    "@babel/helper-define-map": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-define-map/-/helper-define-map-7.8.3.tgz",
+      "integrity": "sha512-PoeBYtxoZGtct3md6xZOCWPcKuMuk3IHhgxsRRNtnNShebf4C8YonTSblsK4tvDbm+eJAw2HAPOfCr+Q/YRG/g==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-function-name": "^7.8.3",
+        "@babel/types": "^7.8.3",
+        "lodash": "^4.17.13"
+      }
+    },
+    "@babel/helper-explode-assignable-expression": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-explode-assignable-expression/-/helper-explode-assignable-expression-7.8.3.tgz",
+      "integrity": "sha512-N+8eW86/Kj147bO9G2uclsg5pwfs/fqqY5rwgIL7eTBklgXjcOJ3btzS5iM6AitJcftnY7pm2lGsrJVYLGjzIw==",
+      "dev": true,
+      "requires": {
+        "@babel/traverse": "^7.8.3",
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-function-name": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.8.3.tgz",
+      "integrity": "sha512-BCxgX1BC2hD/oBlIFUgOCQDOPV8nSINxCwM3o93xP4P9Fq6aV5sgv2cOOITDMtCfQ+3PvHp3l689XZvAM9QyOA==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-get-function-arity": "^7.8.3",
+        "@babel/template": "^7.8.3",
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-get-function-arity": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-get-function-arity/-/helper-get-function-arity-7.8.3.tgz",
+      "integrity": "sha512-FVDR+Gd9iLjUMY1fzE2SR0IuaJToR4RkCDARVfsBBPSP53GEqSFjD8gNyxg246VUyc/ALRxFaAK8rVG7UT7xRA==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-hoist-variables": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-hoist-variables/-/helper-hoist-variables-7.8.3.tgz",
+      "integrity": "sha512-ky1JLOjcDUtSc+xkt0xhYff7Z6ILTAHKmZLHPxAhOP0Nd77O+3nCsd6uSVYur6nJnCI029CrNbYlc0LoPfAPQg==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-member-expression-to-functions": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.8.3.tgz",
+      "integrity": "sha512-fO4Egq88utkQFjbPrSHGmGLFqmrshs11d46WI+WZDESt7Wu7wN2G2Iu+NMMZJFDOVRHAMIkB5SNh30NtwCA7RA==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-module-imports": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-module-imports/-/helper-module-imports-7.8.3.tgz",
+      "integrity": "sha512-R0Bx3jippsbAEtzkpZ/6FIiuzOURPcMjHp+Z6xPe6DtApDJx+w7UYyOLanZqO8+wKR9G10s/FmHXvxaMd9s6Kg==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-module-transforms": {
+      "version": "7.8.6",
+      "resolved": "https://registry.npmjs.org/@babel/helper-module-transforms/-/helper-module-transforms-7.8.6.tgz",
+      "integrity": "sha512-RDnGJSR5EFBJjG3deY0NiL0K9TO8SXxS9n/MPsbPK/s9LbQymuLNtlzvDiNS7IpecuL45cMeLVkA+HfmlrnkRg==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-module-imports": "^7.8.3",
+        "@babel/helper-replace-supers": "^7.8.6",
+        "@babel/helper-simple-access": "^7.8.3",
+        "@babel/helper-split-export-declaration": "^7.8.3",
+        "@babel/template": "^7.8.6",
+        "@babel/types": "^7.8.6",
+        "lodash": "^4.17.13"
+      }
+    },
+    "@babel/helper-optimise-call-expression": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.8.3.tgz",
+      "integrity": "sha512-Kag20n86cbO2AvHca6EJsvqAd82gc6VMGule4HwebwMlwkpXuVqrNRj6CkCV2sKxgi9MyAUnZVnZ6lJ1/vKhHQ==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-plugin-utils": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-plugin-utils/-/helper-plugin-utils-7.8.3.tgz",
+      "integrity": "sha512-j+fq49Xds2smCUNYmEHF9kGNkhbet6yVIBp4e6oeQpH1RUs/Ir06xUKzDjDkGcaaokPiTNs2JBWHjaE4csUkZQ==",
+      "dev": true
+    },
+    "@babel/helper-regex": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-regex/-/helper-regex-7.8.3.tgz",
+      "integrity": "sha512-BWt0QtYv/cg/NecOAZMdcn/waj/5P26DR4mVLXfFtDokSR6fyuG0Pj+e2FqtSME+MqED1khnSMulkmGl8qWiUQ==",
+      "dev": true,
+      "requires": {
+        "lodash": "^4.17.13"
+      }
+    },
+    "@babel/helper-remap-async-to-generator": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-remap-async-to-generator/-/helper-remap-async-to-generator-7.8.3.tgz",
+      "integrity": "sha512-kgwDmw4fCg7AVgS4DukQR/roGp+jP+XluJE5hsRZwxCYGg+Rv9wSGErDWhlI90FODdYfd4xG4AQRiMDjjN0GzA==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-annotate-as-pure": "^7.8.3",
+        "@babel/helper-wrap-function": "^7.8.3",
+        "@babel/template": "^7.8.3",
+        "@babel/traverse": "^7.8.3",
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-replace-supers": {
+      "version": "7.8.6",
+      "resolved": "https://registry.npmjs.org/@babel/helper-replace-supers/-/helper-replace-supers-7.8.6.tgz",
+      "integrity": "sha512-PeMArdA4Sv/Wf4zXwBKPqVj7n9UF/xg6slNRtZW84FM7JpE1CbG8B612FyM4cxrf4fMAMGO0kR7voy1ForHHFA==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-member-expression-to-functions": "^7.8.3",
+        "@babel/helper-optimise-call-expression": "^7.8.3",
+        "@babel/traverse": "^7.8.6",
+        "@babel/types": "^7.8.6"
+      }
+    },
+    "@babel/helper-simple-access": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-simple-access/-/helper-simple-access-7.8.3.tgz",
+      "integrity": "sha512-VNGUDjx5cCWg4vvCTR8qQ7YJYZ+HBjxOgXEl7ounz+4Sn7+LMD3CFrCTEU6/qXKbA2nKg21CwhhBzO0RpRbdCw==",
+      "dev": true,
+      "requires": {
+        "@babel/template": "^7.8.3",
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-split-export-declaration": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.8.3.tgz",
+      "integrity": "sha512-3x3yOeyBhW851hroze7ElzdkeRXQYQbFIb7gLK1WQYsw2GWDay5gAJNw1sWJ0VFP6z5J1whqeXH/WCdCjZv6dA==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helper-wrap-function": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-wrap-function/-/helper-wrap-function-7.8.3.tgz",
+      "integrity": "sha512-LACJrbUET9cQDzb6kG7EeD7+7doC3JNvUgTEQOx2qaO1fKlzE/Bf05qs9w1oXQMmXlPO65lC3Tq9S6gZpTErEQ==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-function-name": "^7.8.3",
+        "@babel/template": "^7.8.3",
+        "@babel/traverse": "^7.8.3",
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helpers": {
+      "version": "7.8.4",
+      "resolved": "https://registry.npmjs.org/@babel/helpers/-/helpers-7.8.4.tgz",
+      "integrity": "sha512-VPbe7wcQ4chu4TDQjimHv/5tj73qz88o12EPkO2ValS2QiQS/1F2SsjyIGNnAD0vF/nZS6Cf9i+vW6HIlnaR8w==",
+      "dev": true,
+      "requires": {
+        "@babel/template": "^7.8.3",
+        "@babel/traverse": "^7.8.4",
+        "@babel/types": "^7.8.3"
+      }
+    },
     "@babel/highlight": {
       "version": "7.8.3",
       "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.8.3.tgz",
@@ -24,6 +354,644 @@
         "js-tokens": "^4.0.0"
       }
     },
+    "@babel/parser": {
+      "version": "7.8.7",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.8.7.tgz",
+      "integrity": "sha512-9JWls8WilDXFGxs0phaXAZgpxTZhSk/yOYH2hTHC0X1yC7Z78IJfvR1vJ+rmJKq3I35td2XzXzN6ZLYlna+r/A==",
+      "dev": true
+    },
+    "@babel/plugin-proposal-async-generator-functions": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-async-generator-functions/-/plugin-proposal-async-generator-functions-7.8.3.tgz",
+      "integrity": "sha512-NZ9zLv848JsV3hs8ryEh7Uaz/0KsmPLqv0+PdkDJL1cJy0K4kOCFa8zc1E3mp+RHPQcpdfb/6GovEsW4VDrOMw==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-plugin-utils": "^7.8.3",
+        "@babel/helper-remap-async-to-generator": "^7.8.3",
+        "@babel/plugin-syntax-async-generators": "^7.8.0"
+      }
+    },
+    "@babel/plugin-proposal-dynamic-import": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-dynamic-import/-/plugin-proposal-dynamic-import-7.8.3.tgz",
+      "integrity": "sha512-NyaBbyLFXFLT9FP+zk0kYlUlA8XtCUbehs67F0nnEg7KICgMc2mNkIeu9TYhKzyXMkrapZFwAhXLdnt4IYHy1w==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-plugin-utils": "^7.8.3",
+        "@babel/plugin-syntax-dynamic-import": "^7.8.0"
+      }
+    },
+    "@babel/plugin-proposal-json-strings": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-json-strings/-/plugin-proposal-json-strings-7.8.3.tgz",
+      "integrity": "sha512-KGhQNZ3TVCQG/MjRbAUwuH+14y9q0tpxs1nWWs3pbSleRdDro9SAMMDyye8HhY1gqZ7/NqIc8SKhya0wRDgP1Q==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-plugin-utils": "^7.8.3",
+        "@babel/plugin-syntax-json-strings": "^7.8.0"
+      }
+    },
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+      "resolved": "https://registry.npmjs.org/private/-/private-0.1.8.tgz",
+      "integrity": "sha512-VvivMrbvd2nKkiG38qjULzlc+4Vx4wm/whI9pQD35YrARNnhxeiRktSOhSukRLFNlzg6Br/cJPet5J/u19r/mg==",
+      "dev": true
+    },
     "process-nextick-args": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
@@ -5302,6 +6377,21 @@
         "strip-indent": "^1.0.1"
       }
     },
+    "regenerate": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/regenerate/-/regenerate-1.4.0.tgz",
+      "integrity": "sha512-1G6jJVDWrt0rK99kBjvEtziZNCICAuvIPkSiUFIQxVP06RCVpq3dmDo2oi6ABpYaDYaTRr67BEhL8r1wgEZZKg==",
+      "dev": true
+    },
+    "regenerate-unicode-properties": {
+      "version": "8.1.0",
+      "resolved": "https://registry.npmjs.org/regenerate-unicode-properties/-/regenerate-unicode-properties-8.1.0.tgz",
+      "integrity": "sha512-LGZzkgtLY79GeXLm8Dp0BVLdQlWICzBnJz/ipWUgo59qBaZ+BHtq51P2q1uVZlppMuUAT37SDk39qUbjTWB7bA==",
+      "dev": true,
+      "requires": {
+        "regenerate": "^1.4.0"
+      }
+    },
     "regex-not": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/regex-not/-/regex-not-1.0.2.tgz",
@@ -6612,6 +7702,34 @@
       "integrity": "sha1-XkvaMI5KiirlhPm5pDWaSZglzFA=",
       "dev": true
     },
+    "unicode-canonical-property-names-ecmascript": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/unicode-canonical-property-names-ecmascript/-/unicode-canonical-property-names-ecmascript-1.0.4.tgz",
+      "integrity": "sha512-jDrNnXWHd4oHiTZnx/ZG7gtUTVp+gCcTTKr8L0HjlwphROEW3+Him+IpvC+xcJEFegapiMZyZe02CyuOnRmbnQ==",
+      "dev": true
+    },
+    "unicode-match-property-ecmascript": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/unicode-match-property-ecmascript/-/unicode-match-property-ecmascript-1.0.4.tgz",
+      "integrity": "sha512-L4Qoh15vTfntsn4P1zqnHulG0LdXgjSO035fEpdtp6YxXhMT51Q6vgM5lYdG/5X3MjS+k/Y9Xw4SFCY9IkR0rg==",
+      "dev": true,
+      "requires": {
+        "unicode-canonical-property-names-ecmascript": "^1.0.4",
+        "unicode-property-aliases-ecmascript": "^1.0.4"
+      }
+    },
+    "unicode-match-property-value-ecmascript": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/unicode-match-property-value-ecmascript/-/unicode-match-property-value-ecmascript-1.1.0.tgz",
+      "integrity": "sha512-hDTHvaBk3RmFzvSl0UVrUmC3PuW9wKVnpoUDYH0JDkSIovzw+J5viQmeYHxVSBptubnr7PbH2e0fnpDRQnQl5g==",
+      "dev": true
+    },
+    "unicode-property-aliases-ecmascript": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/unicode-property-aliases-ecmascript/-/unicode-property-aliases-ecmascript-1.0.5.tgz",
+      "integrity": "sha512-L5RAqCfXqAwR3RriF8pM0lU0w4Ryf/GgzONwi6KnL1taJQa7x1TCxdJnILX59WIGOwR57IVxn7Nej0fz1Ny6fw==",
+      "dev": true
+    },
     "union-value": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.1.tgz",
diff --git a/package.json b/package.json
index 3ba016e..6e984ec 100644
--- a/package.json
+++ b/package.json
@@ -26,19 +26,22 @@
   "devDependencies": {
     "gulp": "^4.0.2",
     "gulp-autoprefixer": "^7.0.1",
+    "gulp-babel": "^8.0.0",
     "gulp-clean-css": "^4.2.0",
     "gulp-connect": "^5.7.0",
     "gulp-eslint": "^6.0.0",
+    "gulp-header": "^2.0.9",
     "gulp-qunit": "^2.1.1",
     "gulp-rename": "^2.0.0",
     "gulp-sass": "^4.0.2",
     "gulp-uglify": "^3.0.2",
-    "gulp-header": "^2.0.9",
     "gulp-zip": "^5.0.1",
-    "yargs": "^15.1.0",
     "express": "^4.17.1",
     "mustache": "^4.0.0",
-    "socket.io": "^2.3.0"
+    "socket.io": "^2.3.0",
+    "yargs": "^15.1.0",
+    "@babel/core": "^7.8.7",
+    "@babel/preset-env": "^7.8.7"
   },
   "eslintConfig": {
     "env": {