fix: org-store-link doesn't work unless you load mu4e

When mu4e layer is present org-store-link doesn't work immediately when you
start Emacs, unless you explicitly load mu4e.

It'd display "Please load mu4e before mu4e-org" message and do nothing.

layers/+email/mu4e/packages.el

@@ -152,7 +152,9 @@ mu4e-use-maildirs-extension-load to be evaluated after mu4e has been loaded."
 
 (defun mu4e/pre-init-org ()
   ;; load mu4e-org when org is actually loaded
-  (with-eval-after-load 'org (require 'mu4e-org nil 'noerror)))
+  (with-eval-after-load 'org
+    (require 'mu4e nil 'noerror)
+    (require 'mu4e-org nil 'noerror)))
 
 (defun mu4e/pre-init-window-purpose ()
   (spacemacs|use-package-add-hook window-purpose