Bump alta-maven-plugin from 0.7.0 to 0.7.1

Bumps [alta-maven-plugin](https://github.com/veithen/alta) from 0.7.0 to 0.7.1.
- [Release notes](https://github.com/veithen/alta/releases)
- [Commits](https://github.com/veithen/alta/compare/0.7.0...0.7.1)

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