Temp commit for composer

.travis.yml

@@ -1,6 +1,7 @@
 language: php
 
 php:
+  - 7.2
   - 7.3
   - 7.4
 

composer.json

@@ -19,7 +19,7 @@
         }
     },
     "require": {
-        "php": ">=7.3",
+        "php": ">=7.2",
         "ext-soap": "*",
         "ext-dom": "*",
         "ext-xmlwriter": "*",

src/Client/CurlClient.php

@@ -61,7 +61,7 @@ public function send(string $url, string $httpMethod, array $headers = [],  stri
 
         $decodedResponse = json_decode($responseMessage, true);
         if ($decodedResponse === null) {
-            throw new ProcessingException();
+            throw new InkRouterNotAvailableException();
         }
 
         return new CurlResponse($decodedResponse, $statusCode);