Nullable range and location (#7)

* Set range and location as nullable
* Update haxerc to version used by Haxe LSP
(previous is too old for lix to resolve)

Author: kLabz

.haxerc

@@ -1,4 +1,4 @@
 {
-  "version": "b7fce0e",
+  "version": "e30a2fd",
   "resolveLibs": "scoped"
 }

src/languageServerProtocol/Types.hx

@@ -226,7 +226,7 @@ typedef DiagnosticRelatedInformation = {
 	/**
 		The location of this related diagnostic information.
 	**/
-	var location:Location;
+	var ?location:Location;
 
 	/**
 		The message of this related diagnostic information.
@@ -301,7 +301,7 @@ typedef Diagnostic = {
 	/**
 		The range at which the message applies
 	**/
-	var range:Range;
+	var ?range:Range;
 
 	/**
 		The diagnostic's severity.