Add unicode-escape package

Helps with utf-8 and also set the language-environment to utf8 as well to be
more sure that utf8 is the default.

emacs.org

@@ -234,6 +234,11 @@ So if we don't know, call it text-mode.
 
 utf8 is the best. Default to it.
 
+#+BEGIN_SRC emacs-lisp
+(use-package unicode-escape :ensure t)
+(set-language-environment "UTF-8")
+#+END_SRC
+
 #+BEGIN_SRC emacs-lisp
 (custom-set-variables '(locale-coding-system 'utf-8))
 (set-terminal-coding-system 'utf-8)