Feature: Use HTTP/1.1 protocol version by default and add new Browser::withProtocolVersion(). (#162 by @clue)

This is the preferred HTTP protocol version which also provides decent backwards-compatibility with legacy HTTP/1.0 servers. As such, there should rarely be a need to explicitly change this protocol version. You can revert to legacy HTTP/1.0 like this:

$browser->withProtocolVersion('1.0')->get($url)->then(…);

Feature / Fix: Explicitly close connection after response body ends. (#161 by @clue)

This improves support for servers ignoring the Connection: close request header that would otherwise keep the connection open and could eventually run into a timeout even though the transfer was completed.

Fixed small issue in code example. (#160 by @mmoreram)

Clean up test suite and add .gitattributes to exclude dev files from exports. (#163 by @SimonFrings)