Below can be found useful information for maintenance.
Q: How to upgrade to newer version of Gradle?
A: Run in terminal: ./gradlew wrapper --gradle-version 5.1.1
Instead of 5.1.1 substitute appropriate version number.
Q: Where to find more information about gradle-versions-plugin?
A: https://github.com/ben-manes/gradle-versions-plugin
Q: How to check project dependencies for updates?
A: Run next command in terminal: ./gradlew clean dependencyUpdates