Updates for September 15

[Brandur Leach]

Hi everyone,

We've had a few more releases of our API bindings over the last few weeks. See below for details!

== API Libraries

  - stripe-go version 17.4.1 has been released. Changelog: https://github.com/stripe/stripe-go/blob/master/CHANGELOG

  - stripe-java version 2.9.0 has been released. Changelog: https://github.com/stripe/stripe-java/blob/master/CHANGELOG

  - stripe-php version 3.22.0 has been released. Changelog: https://github.com/stripe/stripe-php/blob/master/CHANGELOG.md

  - stripe-python version 1.38.0 has been released. Changelog: https://github.com/stripe/stripe-python/blob/master/CHANGELOG

  - stripe-ruby version 1.55.0 has been released. Changelog: https://github.com/stripe/stripe-ruby/blob/master/History.txt

Brandur