devel/hs-lsp-types: Update to 1.6.0.0

1.6.0.0
* Add isSubRangeOf and positionInRange helper functions
* Add ServerCancelled, RequestFailed and ErrorCodeCustom server error types
* Fix "workspace/semanticTokens/refresh" to be a server method instead of a
  client method
* Use a packed representation for NormalizedFilePath
* Add converions from OsPath to NormalizedFilePath in
  Language.LSP.Types.Uri.OsPath when using new enough filepath

1.5.0.0
* VFS module moved from lsp-types to lsp, as it relates to the actual
  implementation of a LSP server.

(pho)