Version bump to v0.15.1 #694

Job	Run time
lint	1m 2s
docker-build	38s
test	6m 28s
build (linux, amd64)	33s
build (linux, 386)	34s
build (linux, arm)	34s
build (linux, arm64)	36s
build (darwin, amd64)	34s
build (darwin, arm64)	37s
build (windows, amd64)	43s
build (windows, 386)	32s
build (windows, arm)	35s
build (windows, arm64)	38s
integration-test-serverside (f0023141ec429d912e329665f937d05b178a3fee)	2m 12s
integration-test-clientside (v0.13.2)	2m 20s
analyze	2m 8s
	20m 44s

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