v0.13.264

Changes

proxy: fix connection upgrade test for go 1.19 (#2105)
Mikkel Oscar Lyderik Larsen mikkel.larsen@zalando.de identified
the change golang/go@770e0e5
that processes 1xx response status headers differently.
This change refactors tests and adds handling of non-standard
101 Switching Protocols response with Connection: close header.

Docker image

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

docker run -it registry.opensource.zalan.do/teapot/skipper:v0.13.264 skipper --help
# arm64
docker run -it registry.opensource.zalan.do/teapot/skipper-arm64:v0.13.264 skipper --help
# arm v7 32bit
docker run -it registry.opensource.zalan.do/teapot/skipper-armv7:v0.13.264 skipper --help