Bump dart_style to 0.2.10.

CHANGELOG.md

Index: CHANGELOG.md
diff --git a/CHANGELOG.md b/CHANGELOG.md
index cef042e7bcab91d504d4cd28f32a78fa728c1b97..00dcad4a6026a967c62d84b554b2ae0043ee6fdc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,7 @@
   directory containing root certificate files hashed using `c_rehash`.
 
 ### Core library changes
+
 * `dart:core`: Remove deprecated `Resource` class.
   Use the class in `package:resource` instead.
 * `dart:async`
@@ -116,6 +117,13 @@
     }
     ```
 
+### Tool changes
+
+* `dartfmt` - upgraded to v0.2.10
+    * Don't crash on annotations before parameters with trailing commas.
+    * Always split enum declarations if they end in a trailing comma.
+    * Add `--set-exit-if-changed` to set the exit code on a change.
+
 ## 1.19.0
 
 ### Language changes