GDScript: Improve highlighting of types

modules/gdscript/gdscript_editor.cpp

@@ -3396,6 +3396,12 @@ static Error _lookup_symbol_from_base(const GDScriptParser::DataType &p_base, co
 		}
 	}
 
+	if ("Variant" == p_symbol) {
+		r_result.type = ScriptLanguage::LOOKUP_RESULT_CLASS;
+		r_result.class_name = "Variant";
+		return OK;
+	}
+
 	if ("PI" == p_symbol || "TAU" == p_symbol || "INF" == p_symbol || "NAN" == p_symbol) {
 		r_result.type = ScriptLanguage::LOOKUP_RESULT_CLASS_CONSTANT;
 		r_result.class_name = "@GDScript";