Update gems and ruby version

Description

This PR upgrades all gems and the Ruby version.

[x] I have read and followed the contribution guidelines.
[x] All specs and linters pass (including Code Climate)
[x] I have followed the style of nearby code
[x] The build on Semaphore is successful
[x] I have added tests for my changes.
[x] I have gone through my changes by hand, either in the browser or terminal, which ever makes sense
[x] I have internationalized my changes