Merge pull request tj#946 from abetomo/version_bump_2.20.0

version bump 2.20.0

version bump 2.19.0

version bump 2.18.0

version bump 2.17.1

version bump 2.17.0

Merge pull request tj#822 from abetomo/version_bump_2.16.0

version bump 2.16.0

2.15.1

Merge pull request tj#775 from abetomo/version_bump_2.15.0

version bump 2.15.0

version bump 2.14.1

version bump 2.14.0

Also upgrade dependent packages