-Revert"Don't parse class properties without initializers when classProperties plugin is disabled, and Flow is enabled"([#376](https://github.com/babel/babylon/pull/376))
[react-native](https://github.com/facebook/react-native/issues/12542) broke with this so we reverted.
Ifyouwanttomigrateyourprojectfromnon-ESTreemodetoESTree,havealookatour[Readme](https://github.com/babel/babylon/#output), where all deviations are mentioned.
Ensurethatyouenablethe`classProperties` plugin in order to enable correct parsing of class properties. Prior to this version it was possible to parse them by enabling the `flow`pluginbutthiswasnotintendedthebehaviour.
-[#137](https://github.com/babel/babylon/pull/137) - Fix a regression with duplicate exports - it was erroring on all keys in `Object.prototype`. @danez
Thisreleasecontainsmainlysmallbugfixesbutalsoupdatesbabylonsdefaultmodetoes2017.Thefeaturesfor`exponentiationOperator`, `asyncFunctions` and `trailingFunctionCommas`whichpreviouslyneededtobeactivatedviapluginarenowenabledbydefaultandthepluginsarenowno-ops.
>[Asyncgeneratorsandfor-await](https://github.com/tc39/proposal-async-iteration) are now a [stage 2 proposal](https://github.com/tc39/ecma262#current-proposals).