Bump @types/mocha from 7.0.2 to 8.0.0

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)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -55,7 +55,7 @@
     "@istanbuljs/nyc-config-typescript": "^1.0.1",
     "@types/chai": "^4.1.4",
     "@types/chai-as-promised": "^7.1.0",
-    "@types/mocha": "^7.0.0",
+    "@types/mocha": "^8.0.0",
     "@types/node": "^14.0.0",
     "@types/node-fetch": "^2.5.2",
     "@types/snekfetch": "^4.0.1",