Bump mocha from 5.2.0 to 10.2.0

Bumps [mocha](https://github.com/mochajs/mocha) from 5.2.0 to 10.2.0.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](mochajs/mocha@v5.2.0...v10.2.0)

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

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

package.json

@@ -55,7 +55,7 @@
     "less-loader": "4.1.0",
     "load-grunt-tasks": "5.1.0",
     "marked": "4.1.1",
-    "mocha": "5.2.0",
+    "mocha": "10.2.0",
     "node-libs-browser": "2.2.1",
     "postcss-easing-gradients": "3.0.1",
     "postcss-loader": "3.0.0",