oauthenticator

Merge pull request #685 from consideRatio/pr/rename-cilogon-allowed-idps

cilogon: test with new name, old name confirmed to work

cilogon: rename allowed_idps to idps, deprecating old name

Merge pull request #783 from jupyterhub/pre-commit-ci-update-config

[pre-commit.ci] pre-commit autoupdate