propcheck: Move the imports to use test package

Author: Stargator

example/demo.dart

@@ -8,7 +8,7 @@ library demo;
 import 'demolib.dart';
 import 'package:propcheck/propcheck.dart';
 import 'package:enumerators/combinators.dart' as c;
-import 'package:unittest/unittest.dart' hide equals;
+import 'package:test/test.dart' hide equals;
 
 /* --- the properties to test --- */
 

example/mirrors_demo.dart

@@ -2,7 +2,7 @@ library mirrors_demo;
 
 import 'demolib.dart';
 import 'package:propcheck/propcheck_mirrors.dart';
-import 'package:unittest/unittest.dart' hide equals;
+import 'package:test/test.dart' hide equals;
 
 /* --- the properties to test --- */
 

test/mirrors_test.dart

@@ -6,7 +6,7 @@
 import 'package:propcheck/propcheck_mirrors.dart';
 import 'package:enumerators/combinators.dart' as c;
 import 'package:enumerators/enumerators.dart' as e;
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 
 bool boolArgument(bool x) => true;
 bool intArgument(int x) => true;

test/quickcheck_test.dart

@@ -6,7 +6,7 @@
 import 'package:propcheck/propcheck.dart';
 import 'package:enumerators/combinators.dart' as c;
 import 'package:enumerators/enumerators.dart' as e;
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 
 void quickCheckPerformsCheck() {
   bool called = false;

test/smallcheck_test.dart

@@ -5,7 +5,7 @@
 
 import 'package:propcheck/propcheck.dart';
 import 'package:enumerators/combinators.dart' as c;
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 
 void smallCheckPerformsCheck() {
   bool called = false;