Fix false-positive when determining if patcher (current package) is going to be uninstalled

When a package that is really going to be deleted defines a "Vaimo" namespace in its PSR-4 autoload,
then vaimo/composer patches decides that it is going to be deleted and wipes out patches.

It happens because strpos("Vaimo\ComposerPatches", "Vaimo") indeed returns 0.

Author: enl

src/Package/OperationAnalyser.php

@@ -6,25 +6,20 @@
 namespace Vaimo\ComposerPatches\Package;
 
 use Composer\DependencyResolver\Operation\OperationInterface;
+use Vaimo\ComposerPatches\Plugin;
 
 class OperationAnalyser
 {
-    /**
-     * @var \Vaimo\ComposerPatches\Package\ConfigAnalyser
-     */
-    private $configAnalyser;
-
-    public function __construct()
-    {
-        $this->configAnalyser = new \Vaimo\ComposerPatches\Package\ConfigAnalyser();
-    }
-
     public function isPatcherUninstallOperation(OperationInterface $operation)
     {
         if (!$operation instanceof \Composer\DependencyResolver\Operation\UninstallOperation) {
             return false;
         }
 
-        return $this->configAnalyser->ownsNamespace($operation->getPackage(), __NAMESPACE__);
+        return \in_array(
+            Plugin::COMPOSER_PACKAGE,
+            $operation->getPackage()->getNames(),
+            true
+        );
     }
 }

src/Plugin.php

@@ -15,6 +15,8 @@ class Plugin implements
     \Composer\EventDispatcher\EventSubscriberInterface,
     \Composer\Plugin\Capable
 {
+    const COMPOSER_PACKAGE = 'vaimo/composer-patches';
+
     /**
      * @var \Vaimo\ComposerPatches\Package\OperationAnalyser
      */