New OneTimePasswordRequired error for 2FA
Add #password_delivery to OneTimePasswordRequired
Allow create_authorization to be idempotent
script/test now requires client_id/secret in ENV
Filter out client_id and secret from VCR cassettes
Add specs for creating idempotent API Authorizations
Merge pull request #2 from github/2fa-401

New OneTimePasswordRequired error for 2FA
Merge branch 'master' into idempotent-authorizations
Merge branch 'master' of https://github.com/github/octokit.rb
Merge branch 'github-idempotent-authorizations'
Stub new ENV vars for Travis
Bump for release
Release 2.1.0