pkg/csslib: use pkg/test and allow latest version of logging pkg

test/compiler_test.dart

 // Copyright (c) 2012, 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.
 
 library compiler_test;
 
 import 'dart:convert';
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 import 'package:csslib/parser.dart';
 import 'package:csslib/visitor.dart';
 import 'testing.dart';
 
 void testClass() {
   var errors = [];
   var input = ".foobar {}";
   var stylesheet = parseCss(input, errors: errors);
 
   expect(stylesheet != null, true);
@@ skipping 698 matching lines @@
   test('Selector Groups', testSelectorGroups);
   test('Combinator', testCombinator);
   test('Wildcards', testWildcard);
   test('Pseudo', testPseudo);
   test('Attributes', testAttribute);
   test('Negation', testNegation);
   test('@host', testHost);
   test('Parse List<int> as input', testArrayOfChars);
   test('Simple Emitter', testEmitter);
 }