build(deps): bump rxjava from 2.2.1 to 2.2.2 (#555)
build(deps): bump rxjava from 2.2.1 to 2.2.2 (#555)

Bumps [rxjava](https://github.com/ReactiveX/RxJava) from 2.2.1 to 2.2.2.
- [Release notes](https://github.com/ReactiveX/RxJava/releases)
- [Changelog](https://github.com/ReactiveX/RxJava/blob/2.x/CHANGES.md)
- [Commits](https://github.com/ReactiveX/RxJava/compare/v2.2.1...v2.2.2)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
fossasia/open-event-android,fossasia/open-event-android,fossasia/open-event-android,fossasia/rp15