Bump @types/mocha from 5.2.5 to 7.0.2

Bumps [@types/mocha](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/mocha) from 5.2.5 to 7.0.2.
- [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

@@ -48,7 +48,7 @@
     },
     "devDependencies": {
         "@types/chai": "^4.1.7",
-        "@types/mocha": "^5.2.5",
+        "@types/mocha": "^7.0.2",
         "@types/sinon": "^7.0.3",
         "banner-cli": "0.11.1",
         "chai": "^4.2.0",