v0.12.22

Changes

Uses separate secret reader for grant filters (#1660)
Using shared secret reader is not safe in multitenant setup where users
can define their own routes and thus can access grant secret via bearerinjector filter.

Docker image

Docker image is available in Zalando's Open Source registry:

docker run -it registry.opensource.zalan.do/teapot/skipper:v0.12.22 skipper --help
# arm64
docker run -it registry.opensource.zalan.do/teapot/skipper-arm64:v0.12.22 skipper --help
# arm v7 32bit
docker run -it registry.opensource.zalan.do/teapot/skipper-armv7:v0.12.22 skipper --help