update emacs config to 21th century

conf-lisp/go.el

@@ -0,0 +1,13 @@
+;; *** Go Lang
+
+(use-package go-mode
+             :mode "\\.go\\'"
+             :mode "\\.mod\\'"
+
+             :config
+             (setq gofmt-args '("-s"))
+             (setq tab-width 4)
+             (setq indent-tabs-mode 1)
+
+             :init
+             (add-hook 'before-save-hook 'gofmt-before-save))