Bump @babel/core from 7.12.7 to 7.12.9 (#4252)

Bumps [@babel/core](https://github.com/babel/babel/tree/HEAD/packages/babel-core) from 7.12.7 to 7.12.9.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.12.9/packages/babel-core)

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package.json

@@ -12,7 +12,7 @@
     "url": "https://github.com/night/BetterTTV.git"
   },
   "dependencies": {
-    "@babel/core": "^7.12.7",
+    "@babel/core": "^7.12.9",
     "@babel/plugin-transform-runtime": "^7.12.1",
     "@babel/preset-env": "^7.12.7",
     "@babel/runtime": "^7.12.5",