[maven-release-plugin] prepare release v2.1.1
[maven-release-plugin] prepare release v2.1.1

smartpcr/stream-lib,tempbottle/stream-lib,orneryhippo/stream-lib,tempbottle/stream-lib,oertl/stream-lib,joychugh/stream-lib,smartpcr/stream-lib,cykl/stream-lib,oertl/stream-lib,cykl/stream-lib,joychugh/stream-lib,orneryhippo/stream-lib