Javascript-SDK - 4.4.1

## [4.4.1] - November 5, 2020

### Bug fixes
- Allowed using `--isolatedModules` flag in TSConfig file by fixing exports in event processor ([#610](https://github.com/optimizely/javascript-sdk/pull/610))
- Fixed strictNullChecks type errors ([#611](https://github.com/optimizely/javascript-sdk/pull/611))

https://github.com/optimizely/javascript-sdk/releases/tag/v4.4.1