Bump socket.io-parser and ember-cli

Bumps [socket.io-parser](https://github.com/Automattic/socket.io-parser) to 3.4.3 and updates ancestor dependency [ember-cli](https://github.com/ember-cli/ember-cli). These dependencies need to be updated together.


Updates `socket.io-parser` from 2.3.1 to 3.4.3
- [Release notes](https://github.com/Automattic/socket.io-parser/releases)
- [Changelog](https://github.com/socketio/socket.io-parser/blob/3.4.3/CHANGELOG.md)
- [Commits](socketio/socket.io-parser@2.3.1...3.4.3)

Updates `ember-cli` from 2.16.2 to 2.18.2
- [Release notes](https://github.com/ember-cli/ember-cli/releases)
- [Changelog](https://github.com/ember-cli/ember-cli/blob/master/CHANGELOG.md)
- [Commits](ember-cli/ember-cli@v2.16.2...v2.18.2)

---
updated-dependencies:
- dependency-name: socket.io-parser
  dependency-type: indirect
- dependency-name: ember-cli
  dependency-type: direct:development
...

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