chore: bump engine.io from 4.0.2 to 4.1.2 (#685)

Bumps [engine.io](https://github.com/socketio/engine.io) from 4.0.2 to 4.1.2.
- [Release notes](https://github.com/socketio/engine.io/releases)
- [Changelog](https://github.com/socketio/engine.io/blob/4.1.2/CHANGELOG.md)
- [Commits](socketio/engine.io@4.0.2...4.1.2)

---
updated-dependencies:
- dependency-name: engine.io
  dependency-type: direct:development
...

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

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

Author: dependabot[bot]

package-lock.json

@@ -62,7 +62,7 @@
     "@types/sinonjs__fake-timers": "^6.0.3",
     "babel-loader": "^8.2.2",
     "blob": "0.0.5",
-    "engine.io": "4.0.2",
+    "engine.io": "4.1.2",
     "expect.js": "^0.3.1",
     "express": "^4.17.1",
     "mocha": "^3.2.0",