Fix completion kind info

[deathaxe]

This PR assigns LSP.CompletionItemKind constants to completions.

Fixes #343

[skovhus]

Thanks for fixing this!

[codecov]

Codecov Report

Merging #466 (4e35fd3) into main (d3a0d1e) will not change coverage.
The diff coverage is n/a.

❗ Current head 4e35fd3 differs from pull request most recent head 89aa033. Consider uploading reports for the commit 89aa033 to get more accurate results

@@           Coverage Diff           @@
##             main     #466   +/-   ##
=======================================
  Coverage   74.55%   74.55%           
=======================================
  Files          19       19           
  Lines         668      668           
  Branches      118      118           
=======================================
  Hits          498      498           
  Misses        154      154           
  Partials       16       16           

Impacted Files	Coverage Δ
server/src/server.ts	58.54% <ø> (ø)

Help us with your feedback. Take ten seconds to tell us how you rate us.