[NonGNU ELPA] Flx version 0.6.3

Version 0.6.3 of package Flx has just been released in NonGNU ELPA.
You can now find it in M-x list-packages RET.

Flx describes itself as:

  ================================
  fuzzy matching with good sorting
  ================================

More at https://elpa.nongnu.org/nongnu/flx.html

## Summary:

  [![Build Status](https://travis-ci.org/lewang/flx.png)](http://travis-ci.org/lewang/flx)
  [![MELPA](https://melpa.org/packages/flx-badge.svg)](https://melpa.org/#/flx)
  [![MELPA Stable](https://stable.melpa.org/packages/flx-badge.svg)](https://stable.melpa.org/#/flx)

  ## Status

  This project is more than a year old now.  Lots of bugs have been worked out.

  It appears some people use it on a regular basis.

  ## Screencast

  [Screencast showing rationale and ido workflow][]

  ## Installation

  ### Manual

  Just drop all `.el` files somewhere on your `load-path`. Here's an
  example using the folder `~/.emacs.d/vendor`:

  ```lisp
  (add-to-list 'load-path "~/emacs.d/vendor")
  ```

  ### Package Repositories

  Available packages:

  - `flx` - matching engine
  - `flx-ido` - ido interface for flx

## Recent NEWS:

[Not provided 🙁]