Log Message:
devel/gradle: Update to 4.8.0.

- Dependency locking
- Improvements to publishing plugins:
  - Signing Plugin now supports signing all artifacts of a publication
  - Maven Publish Plugin now provides a dedicated, type-safe DSL to
    customize the POM generated as part of a Maven publication
  - Ivy Publish Plugin now provides a dedicated, type-safe DSL to
    customize the Ivy module descriptor generated as part of an Ivy
    publication
  - Configuration-wide dependency excludes are now published
- The maven-publish and ivy-publish plugins are now considered stable
  and use of the maven plugin is discouraged as it will eventually be
  deprecated
- User experience for incremental annotation processing is improved.
- Compilation will no longer fail when a processor does something that
  Gradle detects will not work incrementally
- Unused non-incremental processors no longer prevent incremental
  compilation
- Annotation processors are now able to decide dynamically if they are
  incremental or not
- Kotlin DSL 0.17.5