message: update changelog for v0.16.9
diff: @@ -6,6 +6,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
  +## [0.16.9] - 2020-10-18
  +### Fixed
  + - reduce language server throttle for validation and parsing now that those have improved performance.
  + - massively improve validation performance by refactoring `getFileByPkgPath`
  + - micro-optimization of hot parser functions
  + - change codebase to use `import type` many places, which reduces the number of files imported at runtime
  +
  +
  +
  ## [0.16.8] - 2020-10-15
  ### Fixed
  - bug when printing diagnostics that would crash if the contents were missing (like for in-memory-only files injected by plugins) ([#217](https://github.com/rokucommunity/brighterscript/pull/217))
  @@ -628,3 +637,4 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
  [0.16.6]: https://github.com/rokucommunity/brighterscript/compare/v0.16.5...v0.16.6
  [0.16.7]: https://github.com/rokucommunity/brighterscript/compare/v0.16.6...v0.16.7
  [0.16.8]: https://github.com/rokucommunity/brighterscript/compare/v0.16.7...v0.16.8
  +[0.16.9]: https://github.com/rokucommunity/brighterscript/compare/v0.16.8...v0.16.9
  