Go-SDK - 1.0.0-beta7

## [1.0.0-beta7] - November 14th, 2019

## New Features
- feat: Method for removing forced variations [#176](https://github.com/optimizely/go-sdk/pull/176)

### Bug Fixes
- fix: Update built-in map-based ExperimentOverrideStore implementation to be concurrently usable [#171](https://github.com/optimizely/go-sdk/pull/171)
- fix: Add a public constructor for MapExperimentOverridesStore [#174](https://github.com/optimizely/go-sdk/pull/174)
- fix: don't return error when there is a good projectConfig in polling manager [#179](https://github.com/optimizely/go-sdk/pull/179)
- fix(decision): Logs produced by the various decision services. [#180](https://github.com/optimizely/go-sdk/pull/180)
- fix(exists-condition) Fixed exists comparison for leaf condition. [#185](https://github.com/optimizely/go-sdk/pull/185)

https://github.com/optimizely/go-sdk/releases/tag/v1.0.0-beta7