Fixed Process issue for Laravel 7

Author: maab16

src/Commands/InstallMenuBuilder.php

@@ -72,7 +72,7 @@ public function handle(Filesystem $filesystem)
 
         $this->info('Dumping the autoloaded files and reloading all new files');
         $composer = $this->findComposer();
-        $process  = new Process($composer . ' dump-autoload');
+        $process  = Process::fromShellCommandline($composer . ' dump-autoload');
         $process->setTimeout(null); // Setting timeout to null to prevent installation from stopping at a certain point in time
         $process->setWorkingDirectory(base_path())->run();