meek-amazon bridge upgrades to [0.27](https://gitweb.torproject.org/pluggable-transports/meek.git/log/?id=0.27) ([diff](https://trac.torproject.org/projects/tor/wiki/doc/meek?action=diff&version=252)) URL: https://trac.torproject.org/projects/tor/wiki/doc/meek?version=252