Fix code style according to php cs fixer rules

Author: Tiago Brito

src/VCR/Util/Assertion.php

@@ -1,4 +1,5 @@
 <?php
+
 namespace VCR\Util;
 
 use Assert\Assertion as BaseAssertion;

src/VCR/Util/HttpClient.php

@@ -1,4 +1,5 @@
 <?php
+
 namespace VCR\Util;
 
 use VCR\Request;

tests/VCR/Util/StreamHelperTest.php

@@ -1,4 +1,5 @@
 <?php
+
 namespace VCR\Util;
 
 use VCR\Request;

tests/integration/soap/src/VCR/Example/ExampleSoapClient.php

@@ -1,4 +1,5 @@
 <?php
+
 namespace VCR\Example;
 
 /**