Fix PHP5 support, update code style

Author: adamquaile

src/Client.php

@@ -75,7 +75,9 @@ public function sendRequest(RequestInterface $request)
     {
         $this->requests[] = $request;
 
-        foreach ($this->conditionalResults as ['matcher' => $matcher, 'callable' => $callable]) {
+        foreach ($this->conditionalResults as $result) {
+            $matcher = $result['matcher'];
+            $callable = $result['callable'];
 
             /**
              * @var RequestMatcher $matcher
@@ -107,28 +109,33 @@ public function sendRequest(RequestInterface $request)
     }
 
     /**
-     * @param RequestMatcher $requestMatcher
+     * @param RequestMatcher                        $requestMatcher
      * @param ResponseInterface|\Exception|callable $result
      */
     public function on(RequestMatcher $requestMatcher, $result)
     {
         $callable = null;
+
         switch (true) {
             case is_callable($result):
                 $callable = $result;
                 break;
             case $result instanceof ResponseInterface:
-                $callable = function () use ($result) { return $result; };
+                $callable = function () use ($result) {
+                    return $result;
+                };
                 break;
             case $result instanceof \Exception:
-                $callable = function () use ($result) { throw $result; };
+                $callable = function () use ($result) {
+                    throw $result;
+                };
                 break;
             default:
-                throw new \InvalidArgumentException("Result must be either a response, an exception, or a callable");
+                throw new \InvalidArgumentException('Result must be either a response, an exception, or a callable');
         }
         $this->conditionalResults[] = [
-            'matcher'   => $requestMatcher,
-            'callable'  => $callable
+            'matcher' => $requestMatcher,
+            'callable' => $callable
         ];
     }