Bump @babel/plugin-syntax-dynamic-import from 7.2.0 to 7.7.4

Bumps [@babel/plugin-syntax-dynamic-import](https://github.com/babel/babel) from 7.2.0 to 7.7.4.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](babel/babel@v7.2.0...v7.7.4)

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Author: dependabot-preview[bot]

js/main.js.map

@@ -26,7 +26,7 @@
   },
   "devDependencies": {
     "@babel/core": "^7.7.7",
-    "@babel/plugin-syntax-dynamic-import": "^7.2.0",
+    "@babel/plugin-syntax-dynamic-import": "^7.7.4",
     "@babel/preset-env": "^7.7.7",
     "babel-loader": "^8.0.6",
     "css-loader": "^3.4.0",