feat: goto type and implemenatation capabilities (#14)

Author: dantleech

src/ServerCapabilities.php

@@ -39,6 +39,24 @@ class ServerCapabilities
      */
     public $definitionProvider;
 
+    /**
+     * The server provides goto type definition support.
+     *
+     * @since 3.6.0
+     *
+     * @var bool|null
+     */
+    public $typeDefinitionProvider;
+
+    /**
+     * The server provides goto implementation support.
+     *
+     * @since 3.6.0
+     *
+     * @var bool|null
+     */
+    public $implementationProvider;
+
     /**
      * The server provides find references support.
      *