Upgrade ruby version (#124)
Upgrade ruby version (#124)

* upgrade ruby

* fix user factory

* only confirm if user exists

* upgrade to 2.4.2

* use 2.4.1

atomicjolt/adhesion,atomicjolt/lti_starter_app,atomicjolt/adhesion,atomicjolt/adhesion,atomicjolt/lti_starter_app,atomicjolt/lti_starter_app,atomicjolt/adhesion,atomicjolt/lti_starter_app