Use languageserver-types crate (#79)

* Changes to use languageserver-types crate

* Complete usage of languageserver-types.

Note that a case of DidChangeTextDocumentParams need handling.
Closes #52

* Replaced tabs

* Use MarkedString constructor

* Use Position::new

* symbol_kind_from_def_kind and ls_util module

* CompletionItem::new_simple, removed HoverParams alias

* fix tests

* Cargo.lock

* languageserver-types 0.4.0, which has some fixes.

* comment about VscodeKind deprecation

* ls-types 0.5.0 (URI fields)

* Removed VscodeKind since it was only used by HTTP server

* fix test failures?

* fix tests for logging crate

* Second round of review changes.

Author: bruno-medeiros

Cargo.lock

@@ -14,6 +14,7 @@ serde_json = "0.8"
 serde_derive = "0.8"
 derive-new = "0.3"
 env_logger = "0.3"
+languageserver-types = { version = "0.5.0", git = "https://github.com/gluon-lang/languageserver-types" }
 
 [dependencies.hyper]
 version = "0.9"