Bump mocha from 6.1.4 to 6.2.0 (#161)

Bumps [mocha](https://github.com/mochajs/mocha) from 6.1.4 to 6.2.0.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mochajs/mocha/compare/v6.1.4...v6.2.0)

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

package.json

@@ -82,7 +82,7 @@
     "electron": "5.0.7",
     "electron-builder": "21.0.6",
     "mime": "^2.4.0",
-    "mocha": "^6.1.4",
+    "mocha": "^6.2.0",
     "mustache": "^3.0.1",
     "npm-run-all": "^4.1.5",
     "nyc": "^14.1.1",