Migrate to PSR-18 (#9)

Author: jbelien

Tests/IntegrationTest.php

@@ -12,7 +12,7 @@
 
 use Geocoder\IntegrationTest\ProviderIntegrationTest;
 use Geocoder\Provider\bpost\bpost;
-use Http\Client\HttpClient;
+use Psr\Http\Client\ClientInterface;
 
 class IntegrationTest extends ProviderIntegrationTest
 {
@@ -28,7 +28,7 @@ class IntegrationTest extends ProviderIntegrationTest
         'testGeocodeQuery' => 'Belgium only.',
     ];
 
-    protected function createProvider(HttpClient $httpClient)
+    protected function createProvider(ClientInterface $httpClient)
     {
         return new bpost($httpClient);
     }

bpost.php

@@ -17,13 +17,12 @@
 use Geocoder\Exception\InvalidServerResponse;
 use Geocoder\Exception\UnsupportedOperation;
 use Geocoder\Http\Provider\AbstractHttpProvider;
-use Geocoder\Model\Address;
 use Geocoder\Model\AddressBuilder;
 use Geocoder\Model\AddressCollection;
 use Geocoder\Provider\Provider;
 use Geocoder\Query\GeocodeQuery;
 use Geocoder\Query\ReverseQuery;
-use Http\Client\HttpClient;
+use Psr\Http\Client\ClientInterface;
 
 /**
  * @author Jonathan Beliën <jbe@geo6.be>
@@ -36,9 +35,9 @@ final class bpost extends AbstractHttpProvider implements Provider
     const GEOCODE_ENDPOINT_URL = 'https://webservices-pub.bpost.be/ws/ExternalMailingAddressProofingCSREST_v1/address/validateAddresses';
 
     /**
-     * @param HttpClient $client an HTTP adapter
+     * @param ClientInterface $client an HTTP adapter
      */
-    public function __construct(HttpClient $client)
+    public function __construct(ClientInterface $client)
     {
         parent::__construct($client);
     }