v2.17.0

The official docker release for this release can be pulled from

quay.io/dexidp/dex:v2.17.0

Notes:

• Dex finally offers a user info endpoint. While this doesn't expose any
  more information than is included in the ID tokens, it allows for using
  Dex in integrations that demand such an endpoint.
• With this release, the Linkedin connector is usable again!

Features:

• Add UserInfo endpoint (#1473, @alindeman, @jackielii, and @fjbsantiago)
• Linkedin: Update to use v2 APIs (#1460, @tanmaykm)
• server: add metrics for CORS handlers (#1429, @tsuna)
• OIDC: Add option to hit the optional userinfo endpoint (#1433, @jacksontj)
• OIDC: Make userID configurable (#1448, @cappyzawa)
• OIDC: Make userName configurable (#1459, @flarno11)
• GitLab: support for group whitelist (#1436, @bonifaido)

Bug fixes, misc changes:

• Print appropriate error when listing connectors fails (#1443, @deric)
• Bitbucket docs: update permission requirements (#1435, @bonifaido)
• Round out logging interface with functions for all levels (#1432, @alindeman)
• Fix typo in SAMLConnector interface (#1430, @mkontani)
• travis: replace golang 1.10 and 1.11 with 1.12 (#1457, @srenatus)
• OIDC: truely ignore "email_verified" claim if configured that way (#1456, @srenatus)
• MAINTAINERS: remove ericchiang@ (#1478, @ericchiang)