fixed installation command on Laravel 7

Author: tabacitu

CHANGELOG.md

@@ -8,6 +8,12 @@ All Notable changes to `Backpack CRUD` will be documented in this file.
 
 -----------
 
+## 4.0.44 - 2020-03-04
+
+### Fixed
+- installation command on Laravel 7;
+
+
 ## 4.0.43 - 2020-03-04
 
 ### Added

src/app/Console/Commands/Install.php

@@ -132,6 +132,7 @@ public function executeProcess($command, $beforeNotice = false, $afterNotice = f
     {
         $this->echo('info', $beforeNotice ? ' '.$beforeNotice : $command);
 
+        // make sure the command is an array as per Symphony 4.3+ requirement
         $command = is_string($command) ? explode(' ', $command) : $command;
 
         $process = new Process($command, null, null, null, $this->option('timeout'));