Roll dart_style 2.0.0 into the SDK.

No formatting changes, so no need to sync the pre-built SDK.

Change-Id: Ide5a58764e865e1226219ce6af9a5cb1444e29b8
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/191463
Auto-Submit: Bob Nystrom <rnystrom@google.com>
Commit-Queue: Jake Macdonald <jakemac@google.com>
Reviewed-by: Jake Macdonald <jakemac@google.com>
diff --git a/DEPS b/DEPS
index 17c6ed1..184913f 100644
--- a/DEPS
+++ b/DEPS
@@ -98,7 +98,7 @@
   #     and land the review.
   #
   # For more details, see https://github.com/dart-lang/sdk/issues/30164
-  "dart_style_tag": "a1d65dd9c4b83c9702ba409465879b94caeb04ea",
+  "dart_style_tag": "2cf810073e0cc7e7ea05d3de51830e6fa6d62924",
 
   "chromedriver_tag": "83.0.4103.39",
   "dartdoc_rev" : "174021f3d76c2a8500b54977c80f32c5bbc099f1",