v0.13.78

Changes

Increases number of algorithm test iterations (#1813)
Algorithm test performs R requests towards N backend
endpoints, counts requests per endpoint and verifies that expected
number of endpoints received at least one request.
For random and powerOfRandomNChoices algorithms it may happen
(by a bad luck) that some backend does not receive any requests which
fails the test.
The issue could be reproduced by

while go test -count=1 github.com/zalando/skipper/loadbalancer -run TestApply; do true; done

or by decresing R.
This change increases R from 100 to 1000 to reduce failure
chances.

Docker image

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

docker run -it registry.opensource.zalan.do/teapot/skipper:v0.13.78 skipper --help
# arm64
docker run -it registry.opensource.zalan.do/teapot/skipper-arm64:v0.13.78 skipper --help
# arm v7 32bit
docker run -it registry.opensource.zalan.do/teapot/skipper-armv7:v0.13.78 skipper --help