Release 0.19.0 (googleapis#614)

Release 0.18.0 (googleapis#612)

Release v1.17.1 (googleapis#609)

Release 0.17.0 (googleapis#607)

Support a GAPIC config v2.

Release 0.16.27 (googleapis#605)

release v0.16.26 (googleapis#603)

Release 0.16.25 (googleapis#600)

Release v0.16.24 (googleapis#598)

0.16.23 (googleapis#595)

Release v0.16.22 (googleapis#592)