mention requirements and inspiration source

Author: Mikael Kermorgant

phpactor-xref.el

@@ -6,7 +6,7 @@
 ;; Created: 05 Aug 2019
 ;; Version: 0.1.0
 ;; Keywords: tools, php
-;; Package-Requires: ((phpactor "0.1.0"))
+;; Package-Requires: ((phpactor "0.1.0")(seq "2"))
 ;; URL: https://github.com/emacs-php/phpactor.el
 ;; License: GPL-3.0-or-later
 
@@ -24,11 +24,12 @@
 ;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 ;;; Commentary:
-
 ;; xref backend using Phpactor.
+;; Inspiration comes from Nicolas Petton's https://github.com/NicolasPetton/xref-js2
 
 ;;; Code:
 (require 'xref)
+(require 'seq)
 
 ;;;###autoload
 (defun phpactor-xref-backend ()

phpactor.el

@@ -832,8 +832,8 @@ function."
   (let ((arguments (phpactor--command-argments :source :path :offset)))
     (apply #'phpactor-action-dispatch (phpactor--rpc "change_visibility" arguments))))
 
-(when phpactor-use-xref
-  (require 'phpactor-xref))
+(autoload 'phpactor-xref-backend "phpactor-xref"
+  "Phpactor backend for Xref.")
 
 (provide 'phpactor)
 ;;; phpactor.el ends here