update .gitignore
diff --git a/.gitignore b/.gitignore
index 80a5bb9..e450c83 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,15 +1,5 @@
 # Don’t commit the following directories created by pub.
-.buildlog
-.pub/
-build/
-packages
-
-# Or the files created by dart2js.
-*.dart.js
-*.js_
-*.js.deps
-*.js.map
-
-# Include when developing application packages.
-pubspec.lock
+.dart_tool/
 .packages
+.pub/
+pubspec.lock