GROOVY-5892: VerifyError if a closure is called using the shortcut notation inside an inner class
GROOVY-5890: Wrong method is selected for "isCase" using "in" operator
GROOVY-5888: Using spread operator should be allowed on arrays too
GROOVY-5884: SKIP doesn't work for constructors
GROOVY-5870: Type checker should not disallow casting an interface to another interface
GROOVY-5889: Type checker goes into infinite loop
upgrade gradle to 1.3
GROOVY-5888: Spread calls sometimes break static context checks