⬆️ Bump mocha from 7.1.1 to 7.1.2 in /packages/core (#946)

Bumps [mocha](https://github.com/mochajs/mocha) from 7.1.1 to 7.1.2.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](mochajs/mocha@v7.1.1...v7.1.2)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

packages/core/package-lock.json

@@ -87,7 +87,7 @@
     "eslint": "6.8.0",
     "handlebars": "^4.7.6",
     "http-server": "0.12.1",
-    "mocha": "7.1.1",
+    "mocha": "7.1.2",
     "module-alias": "2.2.2",
     "nunjucks": "^3.2.1",
     "opal-compiler": "1.0.13",