4.0.0

Changes!

• rename task rewriteWarn to rewriteDryRun and task rewriteFix to rewriteRun #28

As in:

./gradlew rewriteDryRun
./gradlew rewriteRun

4.0.0 is effectively just this one change, but it's a breaking change, so that warrants a major version bump.

Thank you all again for your patronage and bug reports.