fix: use separate rewrite-polyglot version (#233)

[MagicalAsh]

This commit fixes issue #233, where specifying a
rewriteVersion inside the rewrite configuration block would result in rewrite-polyglot failing to resolve to a proper version.

What's changed?

The rewrite-polyglot version can be configured independently from the rewrite version.

What's your motivation?

See #233.

Checklist

• I've added unit tests to cover both positive and negative cases
• I've added the license header to any new files through ./gradlew licenseFormat
• I've used the IntelliJ IDEA auto-formatter on affected files

[timtebeek]

This seems to have been a bug of omission indeed, especially looking at how we have rewriteGradleModelVersion and rewriteKotlinVersion just below. Thanks for stepping up and getting that resolved!

[MagicalAsh]

Awesome, thanks! Do you have a timeline on when this will be available in a release version?

[timtebeek]

I'd expect a new release somewhere this week or next. There was one change we were waiting for, but I believe that hurdle had been cleared. You can already try the snapshot version of that helps you confirm the fix. Thanks again!