Convert Intl from unittest to test

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=159147145

Author: alan-knight

pubspec.yaml

@@ -10,7 +10,7 @@ dependencies:
   path: '>=0.9.0 <2.0.0'
 dev_dependencies:
   fixnum: '>=0.9.0 <0.11.0'
-  unittest: '>=0.10.0 <0.12.0'
+  test: '>=0.12.0 <0.13.0'
 transformers:
 - $dart2js:
     $exclude:

test/bidi_format_test.dart

@@ -5,7 +5,7 @@
 library bidi_format_test;
 
 import 'package:intl/intl.dart';
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 
 /// Tests the bidirectional text formatting library.
 main() {

test/bidi_utils_test.dart

@@ -5,7 +5,7 @@
 library bidi_utils_test;
 
 import 'package:intl/intl.dart';
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 
 /// Tests the bidi utilities library.
 main() {

test/date_time_format_file_even_test.dart

@@ -6,14 +6,14 @@
 /// local file system. This tests one half the locales, since testing all
 /// of them takes long enough that it may cause timeouts in the test bots.
 
+@Timeout(const Duration(seconds: 60))
 library date_time_format_file_test_2;
 
 import 'date_time_format_test_stub.dart';
 import 'data_directory.dart';
 import 'package:intl/date_symbol_data_file.dart';
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 
 main() {
-  unittestConfiguration.timeout = new Duration(seconds: 60);
   runWith(evenLocales, dataDirectory, initializeDateFormatting);
 }

test/date_time_format_file_odd_test.dart

@@ -6,14 +6,14 @@
 /// local file system. This tests one half the locales, since testing all
 /// of them takes long enough that it may cause timeouts in the test bots.
 
+@Timeout(const Duration(seconds: 60))
 library date_time_format_file_test_1;
 
 import 'date_time_format_test_stub.dart';
 import 'data_directory.dart';
 import 'package:intl/date_symbol_data_file.dart';
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 
 main() {
-  unittestConfiguration.timeout = new Duration(seconds: 60);
   runWith(oddLocales, dataDirectory, initializeDateFormatting);
 }

test/date_time_format_http_request_test.dart

@@ -8,7 +8,7 @@
 
 library date_time_format_tests;
 
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 import 'date_time_format_test_data.dart';
 import 'package:intl/intl.dart';
 

test/date_time_format_test_core.dart

@@ -8,7 +8,7 @@
 library date_time_format_test;
 
 import 'dart:async';
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 import 'package:intl/intl.dart';
 import 'date_time_format_test_core.dart';
 

test/date_time_format_test_stub.dart

@@ -11,7 +11,7 @@ library date_time_loose_test;
 
 import 'package:intl/date_symbol_data_local.dart';
 import 'package:intl/intl.dart';
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 
 main() {
   var format;

test/date_time_loose_parsing_test.dart

@@ -8,7 +8,7 @@
 library date_time_strict_test;
 
 import 'package:intl/intl.dart';
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 
 main() {
   test("All input consumed", () {