Update .gitignore – add .dart_tool, remove outdated bits
diff --git a/pkgs/markdown/.gitignore b/pkgs/markdown/.gitignore
index 282c7f8..2afa93d 100644
--- a/pkgs/markdown/.gitignore
+++ b/pkgs/markdown/.gitignore
@@ -1,5 +1,4 @@
-.idea
+.dart_tool
 .packages
 .pub
-packages
 pubspec.lock