Upgrade rails

Really the work of yesteday's  work. Somebody fancy checking?
That's true, personally I don't like the implicit reliance on Gemfile.lock so much. I just like to go to a Gemfile and see which Rails/rspec etc. version a project is on. With Gemfile.lock we don't really need version locks almost anywhere... which I do sometimes but well.

For me that also communicates somehow that updates of the patch level should be done frequently but for minor/major updates more work is necessary.

Anyway no set opinion - just thoughts :)