Go-SDK - v1.0.0-beta3

## [1.0.0-beta3] - October 15th, 2019

### Breaking Changes
- Refactored EventProcessor and ConfigManager components to no longer require an ExecutionContext be passed in during construction. It will be injected into them by the client factory. [#130](https://github.com/optimizely/go-sdk/pull/130)
- Moved the entire `optimizely` package from `github.com/optimizely/go-sdk/optimizely` to `github.com/optimizely/go-sdk/pkg` to better follow convention and best practices. [#135](https://github.com/optimizely/go-sdk/pull/135)

https://github.com/optimizely/go-sdk/releases/tag/v1.0.0-beta3