* Ruby 2.6.3 which has a couple of Unicode improvements
* nginx from 1.5.9 to 1.5.12 (http://nginx.org/en/CHANGES)
* ImageMagick 7.0.8-42 and switch it back to using GitHub, because only the latest release is available on the official site and this regularly breaks our build
* libpng from 1.6.36 to 1.6.37 (security fix)
* gifsicle from 1.91 to 1.92 (http://www.lcdf.org/gifsicle/changes.html)
* Node.js v10, the latest active LTS (https://nodejs.org/en/about/releases/)
Including minor upgrades for redis,ruby,image magick, libpng
One notable thing here is that I removed the SHA check from redis
I am not against checking SHA but we need to explode if it fails and do
something far more consistent across our various downloads
- Update NGINX to latest stable
- Update pngquant to latest stable
- Update ImageMagick to latest stable
Also, remove extra ruby install, it is no longer needed