AssertJ and other Version Updates

[comdotlinux]

• Updated to gradle 8.2.1
• Upgraded to kotlin 1.8.22
• updated assertj to 3.24.2
• junit4 to 4.13.2
• coveralls to 2.12.2

Had to update the script a little bit to make gradle happy and tests are runnign locally but I am not sure if there is loss of functionality, would be happy to update of there are problems, I have no access to travis.

[comdotlinux]

Fixes https://github.com/wuan/assertj-core-kotlin/issues/6

[wuan]

Thank you, after merging some older PRs there are some conflicts which should be easy to fix. Will try to verify the change locally.