Merge pull request haskell#575 from jneira/prepare-hls-plugin-api-0.5…

….0.0

Prepare hls-plugin-api-0.5

Prepare 0.5.1

Merge pull request haskell#439 from jneira/hls-plugin-api-0.4.1

Use ghcide master and prepare hls-plugin-api-0.4.1.0

Prepare for 0.3.0

Update changelog for 0.2.2

Prepare for 0.2.1.0 release