[maven-release-plugin] prepare release google-genomics-utils-v1beta2-0.20
[maven-release-plugin] prepare release google-genomics-utils-v1beta2-0.20

deflaux/utils-java,deflaux/utils-java-OBSOLETE,googlegenomics/utils-java,deflaux/utils-java,iliat/utils-java-OBSOLETE,googlegenomics/utils-java