Add lua-mode to packages

custom.el

@@ -86,7 +86,7 @@
      ("melpa-stable" . "http://stable.melpa.org/packages/")
      ("org" . "http://orgmode.org/elpa/")))
  '(package-selected-packages
-   '(geiser-guile adaptive-wrap org-roam excorporate helm-ag helm-projectile org-journal gist async with-editor treepy s popup epl pkg-info pcre2el dash f password-store hl-todo graphql ghub git-commit magit-popup flycheck helm-core git-gutter avy markdown-mode magit-todos aggressive-indent pass magit helm-flycheck helm avy-zap))
+   '(lua-mode geiser-guile adaptive-wrap org-roam excorporate helm-ag helm-projectile org-journal gist async with-editor treepy s popup epl pkg-info pcre2el dash f password-store hl-todo graphql ghub git-commit magit-popup flycheck helm-core git-gutter avy markdown-mode magit-todos aggressive-indent pass magit helm-flycheck helm avy-zap))
  '(parens-require-spaces nil)
  '(safe-local-variable-values
    '((eval save-excursion