Composer 2 support (#36)

Co-authored-by: hw <hussainweb@gmail.com>
Co-authored-by: VladimirAus <v_roudakov@yahoo.com>

composer.json

@@ -9,7 +9,7 @@
     "nested package"
   ],
   "homepage": "https://github.com/drupal-composer/preserve-paths",
-  "license": "GPL-2.0+",
+  "license": "GPL-2.0-or-later",
   "authors": [
     {
       "name": "Johannes Haseitl",
@@ -21,10 +21,10 @@
     "issues": "https://github.com/drupal-composer/preserve-paths/issues"
   },
   "require": {
-    "composer-plugin-api": "^1.0"
+    "composer-plugin-api": "^1.0 || ^2.0"
   },
   "require-dev": {
-    "composer/composer": "1.*",
+    "composer/composer": "^2.0",
     "phpunit/phpunit": "4.*",
     "derhasi/tempdirectory": "0.1.*",
     "squizlabs/php_codesniffer": "2.*",

src/Plugin.php

@@ -12,7 +12,7 @@
 use Composer\IO\IOInterface;
 use Composer\Plugin\PluginInterface;
 use Composer\Installer\PackageEvent;
-use Composer\Script\ScriptEvents;
+use Composer\Installer\PackageEvents;
 
 /**
  * Class Plugin.
@@ -39,12 +39,12 @@ public function activate(Composer $composer, IOInterface $io)
     public static function getSubscribedEvents()
     {
         return array(
-        ScriptEvents::PRE_PACKAGE_INSTALL => 'prePackage',
-        ScriptEvents::POST_PACKAGE_INSTALL => 'postPackage',
-        ScriptEvents::PRE_PACKAGE_UPDATE => 'prePackage',
-        ScriptEvents::POST_PACKAGE_UPDATE => 'postPackage',
-        ScriptEvents::PRE_PACKAGE_UNINSTALL => 'prePackage',
-        ScriptEvents::POST_PACKAGE_UNINSTALL => 'postPackage',
+            PackageEvents::PRE_PACKAGE_INSTALL => 'prePackage',
+            PackageEvents::POST_PACKAGE_INSTALL => 'postPackage',
+            PackageEvents::PRE_PACKAGE_UPDATE => 'prePackage',
+            PackageEvents::POST_PACKAGE_UPDATE => 'postPackage',
+            PackageEvents::PRE_PACKAGE_UNINSTALL => 'prePackage',
+            PackageEvents::POST_PACKAGE_UNINSTALL => 'postPackage',
         );
     }
 
@@ -55,7 +55,6 @@ public static function getSubscribedEvents()
      */
     public function prePackage(PackageEvent $event)
     {
-
         $this->wrapper->prePackage($event);
     }
 
@@ -68,4 +67,18 @@ public function postPackage(PackageEvent $event)
     {
         $this->wrapper->postPackage($event);
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function deactivate(Composer $composer, IOInterface $io)
+    {
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function uninstall(Composer $composer, IOInterface $io)
+    {
+    }
 }