Javascript-SDK - [3.0.1] - February 21, 2019

### Changed
- Expose default `loggers`, `errorHandlers`, `eventDispatcher` and `enums` on top level require.
- `createLogger` and `createNoOpLogger` are available as methods on `optimizelySdk.logging`
- Added `optimizelySdk.errorHandler`
- Added `optimizelySdk.eventDispatcher`
- Added `optimizelySdk.enums`


https://github.com/optimizely/javascript-sdk/releases/tag/v3.0.1