Add 2x timeout factor to all "ensure_build" tests

Author: kevmoo

_test_yaml/test/ensure_build_test.dart

@@ -8,6 +8,9 @@ import 'package:build_verify/build_verify.dart';
 import 'package:test/test.dart';
 
 void main() {
-  test('ensure_build',
-      () => expectBuildClean(packageRelativeDirectory: '_test_yaml'));
+  test(
+    'ensure_build',
+    () => expectBuildClean(packageRelativeDirectory: '_test_yaml'),
+    timeout: const Timeout.factor(2),
+  );
 }

checked_yaml/test/ensure_build_test.dart

@@ -8,6 +8,9 @@ import 'package:build_verify/build_verify.dart';
 import 'package:test/test.dart';
 
 void main() {
-  test('ensure_build',
-      () => expectBuildClean(packageRelativeDirectory: 'checked_yaml'));
+  test(
+    'ensure_build',
+    () => expectBuildClean(packageRelativeDirectory: 'checked_yaml'),
+    timeout: const Timeout.factor(2),
+  );
 }

example/test/ensure_build_test.dart

@@ -7,6 +7,9 @@ import 'package:build_verify/build_verify.dart';
 import 'package:test/test.dart';
 
 void main() {
-  test('ensure_build',
-      () => expectBuildClean(packageRelativeDirectory: 'example'));
+  test(
+    'ensure_build',
+    () => expectBuildClean(packageRelativeDirectory: 'example'),
+    timeout: const Timeout.factor(2),
+  );
 }