release version 1.12.4

release version 1.12.3

release version 1.12.2

release version 1.12.1

release version 1.12.0

release version 1.11.0

Merge pull request hyperledger#1467 from ashcherbakov/release-1.10.0

bump plenum to stable version

release version 1.9.2

release version 1.9.1

release version 1.9.0