update references to the older branch name (#108)

.github/workflows/build.yaml

diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 3e61a26..7fc2ece 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -2,9 +2,9 @@
 
 on:
   push:
-    branches: [ master ]
+    branches: [ main ]
   pull_request:
-    branches: [ master ]
+    branches: [ main ]
   schedule:
     - cron: "0 0 * * 0"
 

test/test_setup.dart

diff --git a/test/test_setup.dart b/test/test_setup.dart
index afd1d64..8170d38 100644
--- a/test/test_setup.dart
+++ b/test/test_setup.dart
@@ -1,3 +1,6 @@
+// Copyright 2015 Google. All rights reserved. Use of this source code is
+// governed by a BSD-style license that can be found in the LICENSE file.
+
 library wip.test.setup;
 
 import 'dart:async';
@@ -7,6 +10,7 @@
 
 import 'package:shelf/shelf_io.dart' as io;
 import 'package:shelf_static/shelf_static.dart';
+// ignore: deprecated_member_use
 import 'package:webdriver/io.dart';
 import 'package:webkit_inspection_protocol/webkit_inspection_protocol.dart';