Executes unwanted vendor patches

[jaroslavtyc]

{
    "require": {
        "predis/predis": "v1.1.6"
   },
   "require-dev": {
       "phpunit/phpunit": "7.5.20",
       "symplify/vendor-patches": "^11.2"
   }
}

composer update

It crashes on

- Installing phpunit/phpunit (7.5.20): Extracting archive
  - Applying patches for phpunit/phpunit
    ./tests/phpunit_php7.patch (Fix PHP 7 compatibility)

In RemoteFilesystem.php line 108:
                                                                                                                                                                                        
  [TypeError]                                                                                                                                                                           
  Argument 1 passed to Composer\Util\RemoteFilesystem::copy() must be of the type string, null given, called in phar:///usr/local/bin/composer2/src/Composer/Plugin/PluginManager.php(  
  274) : eval()'d code on line 388

The reason is that patch from a vendor library, pointing to its dev dependency, is executed in main project.

I am not sure if I like that feature at all - any library can broke any other library and I would not allow it.

In my case I am lucky as just simple predis/predis library update saves my world (author moved that patch to its own composer.json on-update event).

But I consider it as a too-powerful-to-be-good feature and I am kindly asking you to remove processing of vendor patches.

BTW: Thank for your public libraries, they are very helpful.