v2.19.0

The official docker release for this release can be pulled from

quay.io/dexidp/dex:v2.19.0

Notes:

• Following Mozilla's recommendations for secure TLS settings in the
  "Intermediate" compatibility mode, some insecure cipher suitess have been
  removed, overriding Golang's standard set of ciphers. In the unlikely event
  that this makes one of your clients NOT work with Dex anymore (and there's
  a decent reason for not being able to update that client), please file an
  issue. See #1540 for details.
• As mentioned in documentation, Kubernetes TPR suppport is removed in this
  release.

Features:

• connector/LDAP: display login error (#1530, @bonifaido)
• HTTPS/gRPC: Use a more conservative set of CipherSuites (#1540, @stevendanna)

Bug fixes, misc changes:

• Update ADOPTERS.md (#1534, @jthabet)
• storage/kubernetes: Removing Kubernetes TPR support (#1517, @venezia)
• Dockerfile: build with Golang 1.12.9 (#1529, @dkuerner)
• Kubernetes docs: Clarify the origin of openid-ca (#1521, @erwinvaneyk)
• Code update: Replace x/net/context with stdlib context (#, @erwinvaneyk)