v0.18.0

Change log

Added

• Design for making project FIPS compliant to support users that require it -
  design, cyberark/conjur-authn-k8s-client#106

Changed

• The project now uses goboring/golang as its base image to be FIPS compliant
  cyberark/conjur-authn-k8s-client#113
• The authenticator-client now runs as a limited user in the Docker image
  instead of as root, which is best practice and better follows the principle of
  least privilege
  (cyberark/conjur-authn-k8s-client#111)