1.19.0-rc.3 - improved additional classpath inputs mapping

• Properly map additional classpath inputs to not lose task dependencies (also fix regression with "NoClassDefFoundError" in rc.2) - PR by Björn Kautler
• Remove explicit "dependsOn" for pitest task - #388
• Use classpath file in PIT by default (e.g. to avoid issues with long classpath on Windows) - #237 - PR by Dávid Szigecsán
• PIT 1.22.0 by default
• Improve badges in README

Compatibility notes.

1. useClasspathFile is enabled by default. It should not be a problem in the majority of cases, but still can be disabled explicitly with:

pitest {
    useClasspathFile = false
}

2. The pitest task no longer explicitly depends on tasks related to testSourceSets. It should be no longer necessary with #387 merged. In case of new failures, consider adjusting the additionalClasspath property.

Full list of changes: https://github.com/szpak/gradle-pitest-plugin/compare/release/1.19.0-rc.2..release/1.19.0-rc.3

Thanks to all the contributors to this release: @Vampire, @sigee, @luisgomez29.