3.0.0

Major release!

• kotlin 1.4.0 support
• ktlint 0.38.0 see https://github.com/pinterest/ktlint/releases/tag/0.38.0
• fix editorconfig application #15

Deprecated functionality removed:

• fileBatchSize parameter -- each sourceSet now comprises a batch
• editorConfigPath parameter -- .editorconfig files are automatically located and applied according to the standard
• continuationIndentSize parameter -- deprecated and unused before, presence is now an error