Update `Configuration` to support passing additional imports

[markst]

We have multiple swift packages which need to be imported into our generated definitions.

Similar to how Sourcery supports passing autoMockableImports. https://github.com/krzysztofzablocki/Sourcery/pull/940

These changes include imports in Configuration

[markst]

20

[markst]

@BarredEwe perhaps it might be preferred to allow passing more generics arguments as args?

args:
  autoMockableImports: ["Combine", "BookPlayerKit"]
  autoMockableTestableImports: ["BookPlayer"]

[markst]

Might be an idea to add some tests for Configuration parsing

[BarredEwe]

@BarredEwe perhaps it might be preferred to allow passing more generics arguments as args?

args:
  autoMockableImports: ["Combine", "BookPlayerKit"]
  autoMockableTestableImports: ["BookPlayer"]

Sounds great! This will save us from adding all the arguments from Sourcery in the future. And given the ability to add a custom Stencil, it will be great to throw custom arguments there

[markst]

Great job 👍

If you want, you can add configuration parsing tests. I plan to do it anyway in the future)

I tried adding tests, but it doesn't seem possible for for plugins!

[BarredEwe]

Thanks for the Pull Request! In the new version 2.0, I added support, you can already try it.