Change spec order to make it green again

Not sure why, but after 2945bc58b1fef5433b500d9a44bae484022679c8 the spec added to attributes_spec.rb made criteria_spec start failing, that only happens when running the entire test suite and under MRI
AM, AP bump on Gemfile
Use AM 4.2 rc
Remove guard and guard-rspec from dev env
Bump ruby version
Bump rspec to 3.1.x