Javascript-SDK - 2.2.0 – Support Help Center

## [2.2.0] - September 26, 2018

### Fixed
- Track and activate should not remove null attributes ([#168](https://github.com/optimizely/javascript-sdk/pull/168))
- Track attributes with valid attribute types ([#166](https://github.com/optimizely/javascript-sdk/pull/166))
- Prevent SDK from initializing if the datafile version in invalid ([#161](https://github.com/optimizely/javascript-sdk/pull/161))
- Updating lerna to latest version ([#160](https://github.com/optimizely/javascript-sdk/pull/160))

### Changed
- Change invalid experiment key to debug level ([#165](https://github.com/optimizely/javascript-sdk/pull/165))

https://github.com/optimizely/javascript-sdk/releases/tag/v2.2.0

Javascript-SDK - 2.2.0

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