Project does not compile with latest gradle v7+

Project does not compile with latest gradle v7+

```
Build file '/Users/paul.verest/Workspaces/Try/jitpack-gradle-modular/build.gradle' line: 7

A problem occurred evaluating root project 'jitpack-gradle-modular'.
> Plugin with id 'maven' not found.
```

as maven plugin is removed, maven-published is suggested.

Otherwise used gradle wrapper to choose specific gradle version

