Expect a PSR-18 client instead of a PHP-HTTP client (#1110)

* Expect a PSR-18 client instead of a PHP-HTTP client

* Update integration tests

Author: JaZo

GraphHopper.php

@@ -22,7 +22,7 @@
 use Geocoder\Query\ReverseQuery;
 use Geocoder\Http\Provider\AbstractHttpProvider;
 use Geocoder\Provider\Provider;
-use Http\Client\HttpClient;
+use Psr\Http\Client\ClientInterface;
 
 /**
  * @author Gary Gale <[email protected]>
@@ -45,10 +45,10 @@ final class GraphHopper extends AbstractHttpProvider implements Provider
     private $apiKey;
 
     /**
-     * @param HttpClient $client an HTTP adapter
-     * @param string     $apiKey an API key
+     * @param ClientInterface $client an HTTP adapter
+     * @param string          $apiKey an API key
      */
-    public function __construct(HttpClient $client, string $apiKey)
+    public function __construct(ClientInterface $client, string $apiKey)
     {
         if (empty($apiKey)) {
             throw new InvalidCredentials('No API key provided.');

Tests/IntegrationTest.php

@@ -14,7 +14,7 @@
 
 use Geocoder\IntegrationTest\ProviderIntegrationTest;
 use Geocoder\Provider\GraphHopper\GraphHopper;
-use Http\Client\HttpClient;
+use Psr\Http\Client\ClientInterface;
 
 /**
  * @author Tobias Nyholm <[email protected]>
@@ -30,7 +30,7 @@ class IntegrationTest extends ProviderIntegrationTest
 
     protected $testIpv6 = false;
 
-    protected function createProvider(HttpClient $httpClient)
+    protected function createProvider(ClientInterface $httpClient)
     {
         return new GraphHopper($httpClient, $this->getApiKey());
     }