vim: add luajit support

Add --with-luajit which passes through to the ./configure script
to tell Vim to link against luajit instead of lua.

Closes #27967.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
pdf-tools 0.20 (new formula)

a very useful pdf tool for emacs
Update pdf-tools.rb

1. use a tagged release
2. merged 2 patches
Update pdf-tools.rb

fixed zlib error
pdf-tools: add 0.20 bottle.