chore: release 1.11.0 (googleapis#17)

🤖 I have created a release \*beep\* \*boop\* 
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## [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))
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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)

Release 1.7.3 (#6945)

Release datastore 1.7.2 (#6889)

* Release 1.7.2

Release datastore 1.7.1 (#6325)

Tag datastore-1.7.0 release.

Release datastore 1.6.0 (#4955)

Release datastore-1.5.0 (#4883)