chore: release 1.9.0 (#659)

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

Author: release-please[bot]

CHANGELOG.md

@@ -4,6 +4,26 @@
 
 [1]: https://pypi.org/project/google-cloud-ndb/#history
 
+## [1.9.0](https://www.github.com/googleapis/python-ndb/compare/v1.8.0...v1.9.0) (2021-06-07)
+
+
+### Features
+
+* don't flush entire global cache on transient errors ([#654](https://www.github.com/googleapis/python-ndb/issues/654)) ([cbf2d7d](https://www.github.com/googleapis/python-ndb/commit/cbf2d7de3d532ce08bd0d25fa18b5226afd216b9))
+
+
+### Bug Fixes
+
+* correct inconsistent behavior with regards to namespaces ([#662](https://www.github.com/googleapis/python-ndb/issues/662)) ([cf21a28](https://www.github.com/googleapis/python-ndb/commit/cf21a285e784019f9ba0f2a89a7acc4105fdcd2a)), closes [#661](https://www.github.com/googleapis/python-ndb/issues/661)
+* correctly decode falsy values in legacy protocol buffers ([#628](https://www.github.com/googleapis/python-ndb/issues/628)) ([69a9f63](https://www.github.com/googleapis/python-ndb/commit/69a9f63be89ca50bbf0a42d0565a9f1fdcf6d143)), closes [#625](https://www.github.com/googleapis/python-ndb/issues/625)
+* defer clearing global cache when in transaction ([#660](https://www.github.com/googleapis/python-ndb/issues/660)) ([73020ed](https://www.github.com/googleapis/python-ndb/commit/73020ed8f8eb1430f87be4b5680690d9e373c846))
+* detect cache write failure for `MemcacheCache` ([#665](https://www.github.com/googleapis/python-ndb/issues/665)) ([5d7f163](https://www.github.com/googleapis/python-ndb/commit/5d7f163988c6e8c43579aae616d275db4ca4ff45)), closes [#656](https://www.github.com/googleapis/python-ndb/issues/656)
+* do not set read_consistency for queries. ([#664](https://www.github.com/googleapis/python-ndb/issues/664)) ([36a5b55](https://www.github.com/googleapis/python-ndb/commit/36a5b55b1b21d7333923edd4a42d1a32fd453dfa)), closes [#666](https://www.github.com/googleapis/python-ndb/issues/666)
+* limit memcache keys to 250 bytes ([#663](https://www.github.com/googleapis/python-ndb/issues/663)) ([7dc11df](https://www.github.com/googleapis/python-ndb/commit/7dc11df00fc15392fde61e828e1445eb9e66a1ac)), closes [#619](https://www.github.com/googleapis/python-ndb/issues/619)
+* properly handle error when clearing cache ([#636](https://www.github.com/googleapis/python-ndb/issues/636)) ([d0ffcf3](https://www.github.com/googleapis/python-ndb/commit/d0ffcf3517fe357d6689943265b829258c397d93)), closes [#633](https://www.github.com/googleapis/python-ndb/issues/633)
+* retry connection errors with memcache ([#645](https://www.github.com/googleapis/python-ndb/issues/645)) ([06b466a](https://www.github.com/googleapis/python-ndb/commit/06b466a8421ff7a5586164bf4deb43d6bcbf0ef4)), closes [#620](https://www.github.com/googleapis/python-ndb/issues/620)
+* support ordering by key for multi queries ([#630](https://www.github.com/googleapis/python-ndb/issues/630)) ([508d8cb](https://www.github.com/googleapis/python-ndb/commit/508d8cb8c65afe5e885c1fdba4dce933d52cfd4b)), closes [#629](https://www.github.com/googleapis/python-ndb/issues/629)
+
 ## [1.8.0](https://www.github.com/googleapis/python-ndb/compare/v1.7.3...v1.8.0) (2021-04-06)
 
 

setup.py

@@ -35,7 +35,7 @@ def main():
 
     setuptools.setup(
         name="google-cloud-ndb",
-        version = "1.8.0",
+        version = "1.9.0",
         description="NDB library for Google Cloud Datastore",
         long_description=readme,
         long_description_content_type="text/markdown",