message: update changelog for v0.15.1
diff: @@ -6,6 +6,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
  +## [0.15.1] - 2020-09-30
  +### Fixed
  + - improved performance in the lexer and parser
  + - potential for accidentally changing `cwd` during bsconfig resolving
  +
  +
  +
  ## [0.15.0] - 2020-09-18
  ### Added
  - plugin API to allow visibility into the various compiler phases. This is currently in alpha. ([#170](https://github.com/rokucommunity/brighterscript/pull/170))
  @@ -530,3 +537,4 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
  [0.13.2]: https://github.com/rokucommunity/brighterscript/compare/v0.13.1...v0.13.2
  [0.14.0]: https://github.com/rokucommunity/brighterscript/compare/v0.13.2...v0.14.0
  [0.15.0]: https://github.com/rokucommunity/brighterscript/compare/v0.14.0...v0.15.0
  +[0.15.1]: https://github.com/rokucommunity/brighterscript/compare/v0.15.0...v0.15.1
  