Adding a function_exists conditional around the tap method to reduce conflict with the illuminate/support library

cli/includes/helpers.php

@@ -108,18 +108,20 @@ function should_be_sudo()
     }
 }
 
-/**
+if (! function_exists('tap')) {
+    /**
      * Tap the given value.
      *
      * @param  mixed  $value
      * @param  callable  $callback
      * @return mixed
      */
-function tap($value, callable $callback)
-{
+    function tap($value, callable $callback)
+    {
         $callback($value);
 
         return $value;
+    }
 }
 
 /**