Scala 3 fixes and improvements

[goshacodes]

Pull Request Checklist

• I agree to licence my contributions under the MIT licence
• I have added tests for any changed functionality

Closes

1. Scala 3 regression from Scala 2.13 expected a term symbol but received val <none> #503
2. Scala 3 PathDependent Mock issue #502
3. Compiler error when mocking classes with generics #170 and ScalaMock macro does not infer/resolve context-bound type-parameters correctly #445

Also these can be closed, since I made it work in scala 3 initially:
#60
#93
#39
#499
#198

[goshacodes]

@barkhorn
Hi, merge and publish next candidate please

[goshacodes]

P.S. review is quite simple.
1 issue - 1 commit

[barkhorn]

new release will need to wait a couple days - Thu or Fri.
We used to have snapshot builds during the Travis days, might be worth getting those working again with github workflows - but need to encode the sonatype credentials somehow for that

[barkhorn]

🚢 done!