Bump junit-extras from 0.3 to 0.4
Bump junit-extras from 0.3 to 0.4

Bumps [junit-extras](https://github.com/davidmoten/junit-extras) from 0.3 to 0.4.
- [Release notes](https://github.com/davidmoten/junit-extras/releases)
- [Commits](https://github.com/davidmoten/junit-extras/compare/0.3...0.4)

---
updated-dependencies:
- dependency-name: com.github.davidmoten:junit-extras
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
davidmoten/rxjava-extras,davidmoten/rxjava-extras,davidmoten/rxjava-extras