Upgrading RBENV to a new version of ruby

1. Try installing the new version of ruby (if it installs skip step 2 & 3)

rbenv install <new version>

1. If you get an error message you may need to update rbenv

   brew update && brew upgrade ruby-build

2. Then install again

rbenv install <new version>

1. Install bundle

gem install bundle

1. Get latest so that your .ruby-version points to the correct version. You might need to open a new session to force rbenv to switch the version.

2. Run bundle (this might take a while)

bundle install