Update to work with ratchet/rfc6455 ^0.4.0

[elfordero]

I am using this with ratchet/pawl, which supports ratchet/rfc6455 ^0.4.0, but I have to use an older version of pawl since the constructor signature of \Ratchet\RFC6455\Handshake\ClientNegotiator changed between 0.3.x and 0.4.

In ratchet/pawl ^0.4, Ratchet\Client\Connector::__construct() now passes the result of new gPsr\HttpFactory() as the first argument, which is why I have to use 0.3.x. This in turn requires staying on guzzle 7.2 in order to use the now deprecated gPsr\uri_for($url), instead of uriFor. If this package can be updated, I could also update pawl and guzzle.

[clue]

Yes, definitely planned as part of #1054! 👍

The idea is to make Ratchet compatible with both 0.3.x and 0.4.x simultaneously, supporting both APIs, similar to how we support multiple Symfony versions (see #1095 and #1098).

As outlined in #1054, I can't promise an exact date when I'll get to this, but if you’d like to support us reviving Ratchet, please consider sponsoring us – sponsorships really do make a difference. ❤️

[clue]

Resolved with #1112 finally! 🎉

Ratchet now support v0.4 and v0.3, so it should be fully compatible with Ratchet and other projects relying on newer versions.