message: update changelog for v0.12.0
diff: @@ -6,9 +6,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
  -## [Unreleased]
  +## [0.12.0]
  +### Added
  + - `diagnosticLevel` option to limit/control the noise in the console diagnostics
  +### Changed
  + - Move away from `command-line-args` in favor of `yargs` for CLI support
  ### Fixed
  - Throttle LanguageServer validation to prevent running too many validations in a row.
  + - Bug in CLI preventing ability to provide false values to certain flags
  + - Do not print `info` and `hint` diagnostics from the CLI by default.
  @@ -407,6 +413,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
  +[0.12.0]: https://github.com/rokucommunity/brighterscript/compare/v0.11.3...v0.12.0
  [0.11.3]: https://github.com/rokucommunity/brighterscript/compare/v0.11.2...v0.11.3
  [0.11.2]: https://github.com/rokucommunity/brighterscript/compare/v0.11.1...v0.11.2
  [0.11.1]: https://github.com/rokucommunity/brighterscript/compare/v0.11.0...v0.11.1
  