6.3.18 Bug Fix babylon: #3107 Fix incorrect directive parsing babel-generator: #3158 Parenthesize object expression when it may end up at the start of an expression babel-plugin-transform-regenerator: #3160 Fix typo Polish babel-types: #2933 Generate documentation for babel-types. babel-plugin-transform-es2015-parameter: #2833 Optimize arguments usage. babel-messages: #3123 clarify traverseNeedsParent message.
