v2.3.0

Added

• You can now use Laravel's exists validation rule with Sushi models with the sushi. connection prefix. #88
• Add sushiShouldCache() and sushiCacheReferencePath() methods for caching ->getRows() datasets #94
• Make chunk insert size configurable using new $sushiInsertChunkSize property #92

Fixed

• Avoid error when creating database concurrently #93