upgrade to laravel 7 and set branch to v2

vendor/symfony/process/ExecutableFinder.php

@@ -31,10 +31,8 @@ class ExecutableFinder
 
     /**
      * Adds new possible suffix to check for executable.
-     *
-     * @param string $suffix
      */
-    public function addSuffix($suffix)
+    public function addSuffix(string $suffix)
     {
         $this->suffixes[] = $suffix;
     }
@@ -48,7 +46,7 @@ class ExecutableFinder
      *
      * @return string|null The executable path or default value
      */
-    public function find($name, $default = null, array $extraDirs = [])
+    public function find(string $name, string $default = null, array $extraDirs = [])
     {
         if (ini_get('open_basedir')) {
             $searchPath = array_merge(explode(\PATH_SEPARATOR, ini_get('open_basedir')), $extraDirs);