upgrade dependencies, including migration to package:test

test/report_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// Tests for summary reporting.
 library dev_compiler.test.report_test;
 
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 
 import 'package:dev_compiler/src/testing.dart';
 import 'package:dev_compiler/src/report.dart';
 import 'package:dev_compiler/src/summary.dart';
 
-import 'test_util.dart';
-
 void main() {
-  configureTest();
-
   test('toJson/parse', () {
     var files = {
       '/main.dart': '''
           import 'package:foo/bar.dart';
 
           test1() {
             x = /*severe:StaticTypeError*/"hi";
           }
       '''.replaceAll('\n          ', '\n'),
       'package:foo/bar.dart': '''
@@ skipping 27 matching lines @@
       expect(barMessage.level, "info");
       expect(barMessage.span.text, 'x');
       expect(barMessage.span.context, '  int y = /*info:AssignmentCast*/x;\n');
     }
 
     var original = reporter.result;
     _verifySummary(original);
     _verifySummary(GlobalSummary.parse(original.toJsonMap()));
   });
 }