Fix#2199 and minifying assets file.
jQuery v1.x is supports legacy browsers.
But, Mastodon does not support legacy browsers.
I think jQuery v1.x is unnecessary.
work flawlessly was a nightmare). WARNING: This commit makes the web UI connect to the streaming API instead
of ActionCable like before. This means that if you are upgrading, you should set that up beforehand.
Yamagishi Kazutoshi
Eugen Rochko