Notable changes:

• Fix ConfigureUtil deprecation warning in Gradle 7.6+ - #152
• Improve "not in desired state" error message - #157
• CI basic regression tests with Gradle 8 (effectively from 5.0 to 8.0) - #168
• CI basic regression tests with JDK 17 (effectively with 8, 11 and 17) - #179
• Enhance documentation - #94, #135, #108
• Update used Gradle to 8.0 (still compatible with 5.0+) - #168
• Update project dependencies - #169

More changes.

Big thank you to the contributors who provided pull requests: @TWiStErRob, @vlsi, @nedtwigg, @turansky, @larsgrefer, @nhajratw, @tschuchortdev, @JavierSegoviaCordoba and also those who were involved in any other way.