Issue #2 take 3.x branch to 3.0-beta1

.travis.yml

@@ -7,4 +7,6 @@ php:
 before_script:
   - composer install -n --dev --prefer-source
 
-script: vendor/bin/phpcs --standard=PSR2 src && vendor/bin/phpunit --coverage-text
+script:
+  - vendor/bin/phpcs --standard=PSR2 src
+  - vendor/bin/phpunit --coverage-text

composer.json

@@ -25,18 +25,23 @@
             "Omnipay\\GiroCheckout\\" : "src/"
         }
     },
-    "minimum-stability": "dev",
     "require": {
-        "php": ">=5.6",
-        "omnipay/common": "~3.0@alpha"
+        "omnipay/common": "~3.0"
     },
     "require-dev": {
         "omnipay/tests": "~3.0",
-        "squizlabs/php_codesniffer": "^3.0@dev"
+        "squizlabs/php_codesniffer": "^2.8.1"
+    },
+    "scripts": {
+        "test": "phpunit",
+        "check-style": "phpcs -p --standard=PSR2 src/",
+        "fix-style": "phpcbf -p --standard=PSR2 src/"
     },
     "extra": {
         "branch-alias": {
             "dev-master": "3.0.x-dev"
         }
-    }
+    },
+    "minimum-stability": "dev",
+    "prefer-stable": true
 }

src/Message/AbstractRequest.php

@@ -395,11 +395,11 @@ public function sendData($data)
             "Content-Type" => "application/x-www-form-urlencoded",
         ];
 
-        $httpResponse = $this->httpClient->send(
+        $httpResponse = $this->httpClient->request(
             $this->requestMethod,
             $this->getEndpoint(),
             $headers,
-            $data
+            http_build_query($data)
         );
 
         // A valid response is one in which the hash that has been sent does