chore(deps-dev): bump @types/mocha from 5.2.7 to 7.0.1

Bumps [@types/mocha](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/mocha) from 5.2.7 to 7.0.1.
- [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

@@ -59,7 +59,7 @@
     "@types/chai": "^4.2.7",
     "@types/chai-string": "^1.4.2",
     "@types/dirty-chai": "^2.0.2",
-    "@types/mocha": "^5.2.7",
+    "@types/mocha": "^7.0.1",
     "@types/sinon": "^7.5.1",
     "aegir": "^21.0.2",
     "benchmark": "^2.1.4",