Bump mocha from 8.1.1 to 8.1.3

Bumps [mocha](https://github.com/mochajs/mocha) from 8.1.1 to 8.1.3.
- [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/v8.1.1...v8.1.3)

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

package.json

@@ -55,7 +55,7 @@
     "express-ws": "^4.0.0",
     "glob": "^7.0.5",
     "jsdom": "^16.4.0",
-    "mocha": "^8.1.1",
+    "mocha": "^8.1.3",
     "mustache": "^4.0.1",
     "node-pty": "^0.9.0",
     "nyc": "^15.1.0",