new version of rotp requires string passed to verify
new version of rotp requires string passed to verify

Error message for using rotp-3.3.0: 

> ArgumentError (ROTP only verifies strings - See: https://github.com/mdp/rotp/issues/32)

The rotp gem had an api change, it requires the argument passed to `verify` to be a string. To use the newer version of rotp, we can no longer cast the otp token to int.
travis-ci/travis-sso,travis-ci/travis-sso