Customer: handle packages by name not id

Author: glaubinix

README.md

@@ -63,7 +63,7 @@ Returns an array of customer packages.
 ```php
 $customerId = 42;
 $packages = [
-    ['id' => 12],
+    ['name' => 'acme-website/package'],
 ];
 $packages = $client->customers()->addPackages($customerId, $packages);
 ```
@@ -72,8 +72,8 @@ Returns an array of added customer packages.
 ##### Revoke access to a package from a customer
 ```php
 $customerId = 42;
-$packageId = 12;
-$client->customers()->removePackage($customerId, $packageId);
+$packageName = 'acme-website/package';
+$client->customers()->removePackage($customerId, $packageName);
 ```
 
 #### Package

src/Api/Customers.php

@@ -29,8 +29,8 @@ public function addPackages($customerId, array $packages)
         return $this->post(sprintf('/customers/%s/packages/', $customerId), $packages);
     }
 
-    public function removePackage($customerId, $packageId)
+    public function removePackage($customerId, $packageName)
     {
-        return $this->delete(sprintf('/customers/%s/packages/%s/', $customerId, $packageId));
+        return $this->delete(sprintf('/customers/%s/packages/%s/', $customerId, $packageName));
     }
 }

tests/Api/CustomersTest.php

@@ -62,8 +62,8 @@ public function testListPackages()
     {
         $expected = [
             [
-                'id' => 1,
                 'name' => 'composer/composer',
+                'origin' => 'private',
             ],
         ];
 
@@ -81,12 +81,12 @@ public function testAddPackages()
     {
         $expected = [
             [
-                'id' => 2,
                 'name' => 'composer/composer',
+                'origin' => 'private',
             ],
         ];
 
-        $packages = [['id' => 1]];
+        $packages = [['name' => 'composer/composer']];
 
         /** @var Customers&\PHPUnit_Framework_MockObject_MockObject $api */
         $api = $this->getApiMock();
@@ -101,15 +101,16 @@ public function testAddPackages()
     public function testRemovePackage()
     {
         $expected = '';
+        $packageName = 'composer/composer';
 
         /** @var Customers&\PHPUnit_Framework_MockObject_MockObject $api */
         $api = $this->getApiMock();
         $api->expects($this->once())
             ->method('delete')
-            ->with($this->equalTo('/customers/1/packages/2/'))
+            ->with($this->equalTo(sprintf('/customers/1/packages/%s/', $packageName)))
             ->will($this->returnValue($expected));
 
-        $this->assertSame($expected, $api->removePackage(1, 2));
+        $this->assertSame($expected, $api->removePackage(1, $packageName));
     }
 
     protected function getApiClass()