Composer v2 support

* Support composer v2: add missing methods
* [TASK] update license parts, change vendor name until initial vendor answers about the future work on his repository

Related: #1

.gitignore

@@ -1 +1,3 @@
 /vendor/
+/composer.lock
+/.idea

LICENSE

@@ -1,6 +1,9 @@
 The MIT License (MIT)
 
 Copyright (c) 2016 Mercari, Inc
+Copyright (c) 2020 Josef Glatz, supseven.at
+
+Copyright for portions of project Foo are held by Mercari, Inc, 2016 as part of project composer-diff-plugin. All other copyright for project composer-diff-plugin are held by Josef Glatz, supseven.at, 2020.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 

README.md

@@ -1,5 +1,5 @@
 composer-diff-plugin
-==================
+====================
 
 composer plugin to show library version diff at "composer update".
 
@@ -9,27 +9,28 @@ feature
 -----------------
 
 * print upgrade/downgrade/add/remove of libraries.
-* output `composer.list` file
+* output `composer.list` file which can be added to project's GIT repository.
 
 
 Install
 -----------------
 
 ```bash
-$ composer global require mercari/composer-diff-plugin
+$ composer global require josefglatz/composer-diff-plugin
 ```
 
 Uninstall
 ----------------
 
 ```bash
-$ composer global remove mercari/composer-diff-plugin
+$ composer global remove josefglatz/composer-diff-plugin
 ```
 
 License
 ---------------
 
 Copyright 2016 Mercari, Inc.
+Copyright 2020 Josef Glatz, supseven.at
 
 Licensed under the MIT License
 
@@ -38,6 +39,6 @@ Contribution
 
 Fork the project, create a feature branch, and send us a pull request.
 
-Please read the CLA carefully before submitting your contribution to Mercari.
+Please read the CLA carefully before submitting your contribution to Mercari repository.
 
 https://www.mercari.com/cla/

composer.json

@@ -1,26 +1,30 @@
 {
-    "name": "mercari/composer-diff-plugin",
-    "description": "composer plugin to show library version diff at \"composer update\"",
+    "name": "josefglatz/composer-diff-plugin",
+    "description": "composer plugin which creates a composer.list file and shows library version diff at \"composer update\"",
     "type": "composer-plugin",
     "license": "MIT",
     "authors": [
         {
             "name": "Hiraku NAKANO",
             "email": "hiraku@mercari.com"
+        },
+        {
+            "name": "Josef Glatz",
+            "email": "j.glatz@supseven.at"
         }
     ],
     "require": {
-        "composer-plugin-api": ">=1.0.0-alpha10"
+        "composer-runtime-api": "^2"
     },
     "require-dev": {
-        "composer/composer": "1.0.0-alpha10"
+        "composer/composer": "^2.0"
     },
     "autoload": {
         "psr-4": {
-            "Mercari\\ComposerDiffPlugin\\": "src/"
+            "JosefGlatz\\ComposerDiffPlugin\\": "src/"
         }
     },
     "extra": {
-        "class": "Mercari\\ComposerDiffPlugin\\DiffPlugin"
+        "class": "JosefGlatz\\ComposerDiffPlugin\\DiffPlugin"
     }
 }