Bump dotenv from 6.2.0 to 8.0.0 (#10888)

Bumps [dotenv](https://github.com/motdotla/dotenv) from 6.2.0 to 8.0.0.
- [Release notes](https://github.com/motdotla/dotenv/releases)
- [Changelog](https://github.com/motdotla/dotenv/blob/master/CHANGELOG.md)
- [Commits](https://github.com/motdotla/dotenv/compare/v6.2.0...v8.0.0)

package.json

@@ -86,7 +86,7 @@
     "css-loader": "^2.1.1",
     "cssnano": "^4.1.10",
     "detect-passive-events": "^1.0.2",
-    "dotenv": "^6.2.0",
+    "dotenv": "^8.0.0",
     "emoji-mart": "Gargron/emoji-mart#build",
     "es6-symbol": "^3.1.1",
     "escape-html": "^1.0.3",