chore: release 1.0.0 (googleapis#309)

Release google-cloud-ndb to GA (1.0.0)

chore: release 0.2.2 (googleapis#283)

* updated CHANGELOG.md [ci skip]

* updated setup.py [ci skip]

chore: release 0.2.1 (googleapis#235)

* updated CHANGELOG.md [ci skip]

* updated setup.py [ci skip]

chore(release): Release v0.2.0 (googleapis#232)

* Release v0.2.0

Release v0.1.0

Release v0.1.0

Release python-ndb 0.0.1 (googleapis#109)

* Release 0.0.1

* Bump version in init

Merge pull request googleapis#85 from googleapis/modify-docs-build

update docs build to include publishing to gh-pages on tags.