build(deps): bump rxjava from 2.2.2 to 2.2.3 (#655)
build(deps): bump rxjava from 2.2.2 to 2.2.3 (#655)

Bumps [rxjava](https://github.com/ReactiveX/RxJava) from 2.2.2 to 2.2.3.
- [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/v2.2.2...v2.2.3)

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