[NonGNU ELPA] Racket-Mode version 1

[ELPA update]

Version 1 of package Racket-Mode has just been released in NonGNU ELPA.
You can now find it in M-x list-packages RET.

Racket-Mode describes itself as:

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  Racket editing, REPL, and more
  ==============================

More at https://elpa.nongnu.org/nongnu/racket-mode.html

## Summary:

  1 Racket mode for GNU Emacs
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    [https://github.com/greghendershott/racket-mode/workflows/CI/badge.svg]
    [https://melpa.org/packages/racket-mode-badge.svg]
    [https://elpa.nongnu.org/nongnu/racket-mode.svg]
    [https://img.shields.io/badge/Docs-Documentation-blue.svg]

    A variety of Emacs major and minor modes for [Racket]: edit, REPL,
    check-syntax, debug, profile, logging, and more. The edit/run
    experience is similar to [DrRacket].

    Compatible with *Emacs 25.1+* and *Racket 6.12+*.


  [https://github.com/greghendershott/racket-mode/workflows/CI/badge.svg]
  <https://github.com/greghendershott/racket-mode/actions>

  [https://melpa.org/packages/racket-mode-badge.svg]
  <https://melpa.org/#/racket-mode>

## Recent NEWS:

[Not available 🙁]