message: README: Add link to vscode-language-dyon extension
diff: @@ -24,6 +24,7 @@ dyonrun <file.dyon>
  [Dyon for the Atom Editor](https://github.com/PistonDevelopers/atom-language-dyon)
  [Dyon for the Vim Editor](https://github.com/thyrgle/vim-dyon)
  +[Dyon for Visual Studio Code](https://github.com/martinlindhe/vscode-language-dyon)
  ![coding](./images/code.png)
  