[maven-release-plugin] prepare release stubby4j-1.0.20
[maven-release-plugin] prepare release stubby4j-1.0.20

alenkacz/stubby4j,azagniotov/stubby4j,jasonchaffee/stubby4j,jasonchaffee/stubby4j,azagniotov/stubby4j,azagniotov/stubby4j,azagniotov/stubby4j,alenkacz/stubby4j,alenkacz/stubby4j,jasonchaffee/stubby4j