Pin the pkginfo package to 1.2.1 (#625)
Pin the pkginfo package to 1.2.1 (#625)

Version 1.3.0 of the package was just release and it breaks the CLI
dcos/dcos-cli,dcos/dcos-cli,dcos/dcos-cli,kensipe/dcos-cli,sis-tools/dcos-cli,sis-tools/dcos-cli,dcos/dcos-cli,mesosphere/dcos-cli,kensipe/dcos-cli,kensipe/dcos-cli,mesosphere/dcos-cli,dcos/dcos-cli,mesosphere/dcos-cli,sis-tools/dcos-cli,kensipe/dcos-cli,kensipe/dcos-cli