Update Flutter candidate version (flutter#9735)

Author: elliette

.gitignore

@@ -51,3 +51,7 @@ DEPENDENCIES.md
 
 # Ignore devtools_options.yaml files under example.
 **/example/**/devtools_options.yaml
+
+# macOS generated Flutter files
+**/macos/Flutter/ephemeral/
+**/macos/Flutter/GeneratedPluginRegistrant.swift

flutter-candidate.txt

@@ -1 +1 @@
-3.42.0-0.4.pre
+c6cec79f1f5d4ea1242936c7574af02bd39207c4

packages/devtools_app/lib/src/framework/observer/_memory_web.dart

@@ -65,8 +65,7 @@ extension type _UserAgentSpecificMemoryBreakdownAttributionElement._(JSObject _)
 @JS()
 extension type _UserAgentSpecificMemoryBreakdownAttributionContainerElement._(
   JSObject _
-)
-    implements JSObject {
+) implements JSObject {
   external String get id;
 
   external String get url;