Forward compatibility with PHPUnit v5

Author: clue

composer.json

@@ -22,6 +22,6 @@
     },
     "require-dev": {
         "clue/block-react": "~1.0",
-        "phpunit/phpunit": "^4.8"
+        "phpunit/phpunit": "^5.0 || ^4.8"
     }
 }

tests/FactoryTest.php

@@ -162,7 +162,7 @@ public function testCancelCreateClientWithCancellableHostnameResolver()
 
     public function testCancelCreateClientWithUncancellableHostnameResolver()
     {
-        $promise = $this->getMock('React\Promise\PromiseInterface');
+        $promise = $this->getMockBuilder('React\Promise\PromiseInterface')->getMock();
         $this->resolver->expects($this->once())->method('resolve')->with('example.com')->willReturn($promise);
 
         $promise = $this->factory->createClient('example.com:0');

tests/bootstrap.php

@@ -26,7 +26,7 @@ protected function expectCallableNever()
 
     protected function createCallableMock()
     {
-        return $this->getMock('CallableStub');
+        return $this->getMockBuilder('CallableStub')->getMock();
     }
 
     protected function createResolverMock()