Bump pitest-maven from 1.6.3 to 1.6.4 (#461)
Bump pitest-maven from 1.6.3 to 1.6.4 (#461)

Bumps [pitest-maven](https://github.com/hcoles/pitest) from 1.6.3 to 1.6.4.
- [Release notes](https://github.com/hcoles/pitest/releases)
- [Commits](https://github.com/hcoles/pitest/compare/1.6.3...1.6.4)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
Nincodedo/Ninbot