Bump @types/mocha from 7.0.2 to 8.0.0 (#192)

Bumps [@types/mocha](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/mocha) from 7.0.2 to 8.0.0.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/mocha)

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Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

package.json

@@ -58,7 +58,7 @@
     "prepublish": "rc-tools run guard"
   },
   "devDependencies": {
-    "@types/mocha": "~7.0.1",
+    "@types/mocha": "~8.0.0",
     "@types/react": "^16.0.19",
     "@types/react-dom": "^16.0.2",
     "async": "^0.9.0",