Release 0.16.21 (googleapis#590)

Release v.0.16.20 (googleapis#588)

Merge pull request googleapis#584 from eoogbe/v0_16_19

Release 0.16.19

Release 0.16.18 (googleapis#581)

Release 16.17 (googleapis#578)

Release 0.16.16 (googleapis#576)

Release v0.16.15 (googleapis#573)

Release 0.16.14 (googleapis#570)

release 0.16.13 (googleapis#567)

Let's keep incrementing it up to 0.16.100! That milestone is not too far away.

release (googleapis#565)

Release 0.16.12