Update .gitignore to new dart_tool pub cache (flutter#14)

bcko · kevmoo · commit c9c3e84353d3 · 2019-03-18T09:32:51.000-07:00
dart-lang/sdk#32030
diff --git a/.gitignore b/.gitignore
@@ -1,6 +1,7 @@
 .buildlog
 .DS_Store
 .idea
+.dart_tool/
 .pub/
 .settings/
 build/
