build(deps): update rxjs requirement from ~6.3.0 to ~6.5.1 (#1524)
build(deps): update rxjs requirement from ~6.3.0 to ~6.5.1 (#1524)

Updates the requirements on [rxjs](https://github.com/reactivex/rxjs) to permit the latest version.
- [Release notes](https://github.com/reactivex/rxjs/releases)
- [Changelog](https://github.com/ReactiveX/rxjs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/reactivex/rxjs/commits/6.5.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
stryker-mutator/stryker,stryker-mutator/stryker,stryker-mutator/stryker