Add Emacs plugin

Author: hudochenkov

README.md

@@ -2,7 +2,7 @@
 
 [PostCSS] plugin to keep rules and at-rules content in order.
 
-Also available as [Sublime Text plugin], [Atom plugin], and [VS Code plugin].
+Also available as [Sublime Text], [Atom], [VS Code], and [Emacs] plugin.
 
 Lint style sheets order with [stylelint-order].
 
@@ -88,7 +88,7 @@ See [PostCSS] docs for examples for your environment.
 
 ### Text editor
 
-This plugin available as [Sublime Text plugin], [Atom plugin], and [VS Code plugin].
+This plugin available as [Sublime Text], [Atom], [VS Code], and [Emacs] plugin.
 
 ### Gulp
 
@@ -157,9 +157,10 @@ If you want format style sheets, use [perfectionist] or [stylefmt], also a PostC
 [npm]: https://www.npmjs.com/package/postcss-sorting
 
 [PostCSS]: https://github.com/postcss/postcss
-[Sublime Text plugin]: https://github.com/hudochenkov/sublime-postcss-sorting
-[Atom plugin]: https://github.com/lysyi3m/atom-postcss-sorting
-[VS Code plugin]: https://github.com/mrmlnc/vscode-postcss-sorting
+[Sublime Text]: https://github.com/hudochenkov/sublime-postcss-sorting
+[Atom]: https://github.com/lysyi3m/atom-postcss-sorting
+[VS Code]: https://github.com/mrmlnc/vscode-postcss-sorting
+[Emacs]: https://github.com/P233/postcss-sorting.el
 
 [Gulp PostCSS]: https://github.com/postcss/gulp-postcss
 [Grunt PostCSS]: https://github.com/nDmitry/grunt-postcss