Bump pusher from 1.3.0 to 1.3.1
Bump pusher from 1.3.0 to 1.3.1

Bumps [pusher](https://github.com/pusher/pusher-http-ruby) from 1.3.0 to 1.3.1.
- [Release notes](https://github.com/pusher/pusher-http-ruby/releases/tag/v1.3.1)
- [Changelog](https://github.com/pusher/pusher-http-ruby/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pusher/pusher-http-ruby/compare/v1.3.0...v1.3.1)
hschin/onebody,hschin/onebody,fadiwissa/onebody,fadiwissa/onebody,mattraykowski/onebody,hschin/onebody,fadiwissa/onebody,fadiwissa/onebody,mattraykowski/onebody,mattraykowski/onebody,mattraykowski/onebody,hschin/onebody