make afpre installable using homebrew (brew.sh) tap & document it

[stweise]

I have create a repo here: https://github.com/stweise/homebrew-afpre
to allow installation of afpre using homebrew with very few extra quirks, please see example code block below

stweise@mac-weises:/usr/local$ brew tap stweise/afpre
==> Tapping stweise/afpre
Cloning into '/usr/local/Homebrew/Library/Taps/stweise/homebrew-afpre'...
remote: Enumerating objects: 6, done.
remote: Counting objects: 100% (6/6), done.
remote: Compressing objects: 100% (5/5), done.
remote: Total 6 (delta 0), reused 4 (delta 0), pack-reused 0
Unpacking objects: 100% (6/6), done.
Tapped 1 formula (32 files, 39.8KB).
stweise@mac-weises:~$ brew install stweise/afpre/afpre
==> Installing afpre from stweise/afpre
==> Installing dependencies for stweise/afpre/afpre: oniguruma and jq
==> Installing stweise/afpre/afpre dependency: oniguruma
==> Downloading https://homebrew.bintray.com/bottles/oniguruma-6.9.1.mojave.bottle.tar.gz
==> Downloading from https://akamai.bintray.com/19/1983059c2eae93f1e1ec1bdb65194c64b77182c
######################################################################## 100.0%
==> Pouring oniguruma-6.9.1.mojave.bottle.tar.gz
🍺  /usr/local/Cellar/oniguruma/6.9.1: 17 files, 1.3MB
==> Installing stweise/afpre/afpre dependency: jq
==> Downloading https://homebrew.bintray.com/bottles/jq-1.6.mojave.bottle.1.tar.gz
==> Downloading from https://akamai.bintray.com/71/71f0e76c5b22e5088426c971d5e795fe67abee7
######################################################################## 100.0%
==> Pouring jq-1.6.mojave.bottle.1.tar.gz
🍺  /usr/local/Cellar/jq/1.6: 18 files, 1MB
==> Installing stweise/afpre/afpre
==> Cloning https://github.com/leflamm/afpre.git
Updating /Users/stweise/Library/Caches/Homebrew/afpre--git
==> Checking out tag 0.9.19
HEAD is now at 0009bd0 #39: supersede role
HEAD is now at 0009bd0 #39: supersede role
🍺  /usr/local/Cellar/afpre/0.9.19: 5 files, 19.7KB, built in 2 seconds
stweise@mac-weises:/usr/local$ which afpre
/usr/local/bin/afpre
stweise@mac-weises:/usr/local$ afpre --version
VERSION_PLACEHOLDER
stweise@mac-weises:/usr/local$ brew remove stweise/afpre/afpre
Uninstalling /usr/local/Cellar/afpre/0.9.19... (5 files, 19.5KB)
stweise@mac-weises:/usr/local$ brew untap stweise/afpre
Untapping stweise/afpre...
Untapped 1 formula (33 files, 40.8KB).
stweise@mac-weises:/usr/local$ which afpre
stweise@mac-weises:/usr/local$ 

There are several issues with this solution which would require work on your part.

1. the github username is stweise it should be leflamm as credit should go to you, can you please clone/fork the repo under you username?
2. I fixed the version to 0.9.19 as you do not provide a latest tag and I did not want to point to HEAD of master.
3. as you can see from the output afpre --version returns a placeholder of some sort, can you make that the actual version?
4. it would be nice to have the install (and ideally also removal) instructions visible (README.md, Install.md, ...)