Bump eslint-plugin-mocha from 5.3.0 to 6.3.0 (#109)

Bumps [eslint-plugin-mocha](https://github.com/lo1tuma/eslint-plugin-mocha) from 5.3.0 to 6.3.0.
- [Release notes](https://github.com/lo1tuma/eslint-plugin-mocha/releases)
- [Changelog](https://github.com/lo1tuma/eslint-plugin-mocha/blob/master/CHANGELOG.md)
- [Commits](lo1tuma/eslint-plugin-mocha@5.3.0...6.3.0)

---
updated-dependencies:
- dependency-name: eslint-plugin-mocha
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -31,7 +31,7 @@
     "eslint-config-airbnb": "^17.1.0",
     "eslint-plugin-chai-expect": "^2.0.1",
     "eslint-plugin-import": "^2.17.3",
-    "eslint-plugin-mocha": "^5.3.0",
+    "eslint-plugin-mocha": "^6.3.0",
     "eslint-plugin-node": "^8.0.0",
     "eslint-plugin-promise": "^4.1.1",
     "mocha": "^6.1.4"