message: update changelog for v0.3.1
diff: @@ -5,6 +5,14 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
  and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
  +
  +## [0.3.1] - 2019-11-08
  +### Fixed
  + - language server bug that was showing error messages in certain startup race conditions.
  + - error during hover caused by race condition during file re-parse.
  +
  +
  +
  ## [0.3.0] - 2019-10-03
  ### Added
  - support for parsing opened files not included in any project.
  