Update travis config

Merge pull request mochi#165 from mochi/codepoint-to-bytes-surrogate

Support parsing UTF-16 surrogate pairs in mochiweb_html mochi#164

exit when setopts result is {error,closed} mochi#152

update CHANGES for v2.12.1

send "Connection: close" header when the server is going to force-clo…

…se the connection mochi#146