chore: release 1.15.0 (googleapis#69)

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

chore: release 1.14.0 (googleapis#62)

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

chore: release 1.13.2 (googleapis#48)

* updated CHANGELOG.md [ci skip]

* updated setup.cfg [ci skip]

* updated setup.py

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

chore: release 1.13.1 (googleapis#44)

* updated CHANGELOG.md [ci skip]

* updated setup.cfg [ci skip]

* updated setup.py

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

chore: release 1.13.0 (googleapis#29)

* updated CHANGELOG.md [ci skip]

* updated setup.cfg [ci skip]

* updated setup.py

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

chore: release 1.12.0 (googleapis#23)

* updated CHANGELOG.md [ci skip]

* updated setup.cfg [ci skip]

* updated setup.py [ci skip]

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

chore: release 1.11.0 (googleapis#17)

🤖 I have created a release \*beep\* \*boop\* 
---
## [1.11.0](https://www.github.com/googleapis/python-datastore/compare/v1.10.0...v1.11.0) (2020-02-27)


### Features

* **datastore:** add return query object in add filter method ([googleapis#12](https://www.github.com/googleapis/python-datastore/issues/12)) ([6a9efab](https://www.github.com/googleapis/python-datastore/commit/6a9efabe1560d5137986df70f1b4f79731deac02))
---


This PR was generated with [Release Please](https://github.com/googleapis/release-please).

chore(datastore): release 1.10.0 (#9449)

Release datastore 1.9.0 (#8751)

Release datastore-1.8.0 (#8020)