Add CURL as default adapter

Author: mikebronner

composer.json

@@ -27,6 +27,7 @@
         "geocoder-php/bing-maps-provider": "dev-master@dev",
         "geocoder-php/chain-provider": "dev-master@dev",
         "geocoder-php/common-http": "dev-master@dev",
+        "php-http/curl-client": "dev-master@dev",
         "geocoder-php/free-geoip-provider": "dev-master@dev",
         "geocoder-php/google-maps-provider": "dev-master@dev",
         "geocoder-php/maxmind-binary-provider": "dev-master@dev",

config/geocoder.php

@@ -6,7 +6,7 @@
  * file that was distributed with this source code.
  */
 
-use Http\Adapter\Guzzle6\Client;
+use Http\Client\Curl\Client;
 use Geocoder\Provider\BingMaps\BingMaps;
 use Geocoder\Provider\Chain\Chain;
 use Geocoder\Provider\FreeGeoIp\FreeGeoIp;

tests/Laravel5_3/Providers/GeocoderServiceTest.php

@@ -11,7 +11,7 @@
 use Geocoder\Query\GeocodeQuery;
 use Geocoder\Query\ReverseQuery;
 use Geocoder\Model\Coordinates;
-use Http\Adapter\Guzzle6\Client as GuzzleAdaptor;
+use Http\Client\Curl\Client as CurlAdapter;
 use Illuminate\Support\Collection;
 
 /**
@@ -148,7 +148,7 @@ public function testConfig()
         $this->assertCount(3, $providers);
         $this->assertArrayHasKey(GoogleMaps::class, $providers[Chain::class]);
         $this->assertArrayHasKey(FreeGeoIp::class, $providers[Chain::class]);
-        $this->assertSame(GuzzleAdaptor::class, $this->app['config']->get('geocoder.adapter'));
+        $this->assertSame(CurlAdapter::class, $this->app['config']->get('geocoder.adapter'));
     }
 
     public function testLoadedProviders()