update index version

Author: tangzx

src/main/java/com/tang/intellij/lua/lang/LuaLanguage.java

@@ -24,7 +24,7 @@
  */
 public class LuaLanguage extends Language {
 
-    public static final int INDEX_VERSION = 9;
+    public static final int INDEX_VERSION = 10;
 
     public static final LuaLanguage INSTANCE = new LuaLanguage();