v0.14.10

Changes

Fix CloneRoute bug (#2146)
CloneRoute Preprocessor was dropping builtin predicates resulting in wrong eskip
Refactor test cases for prepocessor and add one to test builtins.

Docker image

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

docker run -it registry.opensource.zalan.do/teapot/skipper:v0.14.10 skipper --help
# arm64
docker run -it registry.opensource.zalan.do/teapot/skipper-arm64:v0.14.10 skipper --help
# arm v7 32bit
docker run -it registry.opensource.zalan.do/teapot/skipper-armv7:v0.14.10 skipper --help