chore: release 1.3.0 (#48)

* created CHANGELOG.md [ci skip]

* updated setup.py

* Update CHANGELOG.md

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

Author: release-please[bot]

packages/proto-plus/CHANGELOG.md

@@ -0,0 +1,15 @@
+# Changelog
+
+## [1.3.0](https://www.github.com/googleapis/proto-plus-python/compare/1.2.0...v1.3.0) (2020-07-16)
+
+
+### Features
+
+* add convenience methods to convert to/from json ([#39](https://www.github.com/googleapis/proto-plus-python/issues/39)) ([2868946](https://www.github.com/googleapis/proto-plus-python/commit/286894609843f568c9ff367ab79542783642b801))
+* add DatetimeWithNanoseconds class to maintain Timestamp pb precision. ([#40](https://www.github.com/googleapis/proto-plus-python/issues/40)) ([a17ccd5](https://www.github.com/googleapis/proto-plus-python/commit/a17ccd52c7fa3609ce79fde84b931c0693f53171)), closes [#38](https://www.github.com/googleapis/proto-plus-python/issues/38)
+* add support for proto3 optional fields ([#35](https://www.github.com/googleapis/proto-plus-python/issues/35)) ([0eb5762](https://www.github.com/googleapis/proto-plus-python/commit/0eb5762681e315635db1dffd583d91a4f32cba43))
+
+
+### Bug Fixes
+
+* Modify setup.py to indicate this is google maintained ([#45](https://www.github.com/googleapis/proto-plus-python/issues/45)) ([96b3b00](https://www.github.com/googleapis/proto-plus-python/commit/96b3b00dd6712fe44e71dedf8080b20544e95416))

packages/proto-plus/setup.py

@@ -17,7 +17,7 @@
 
 from setuptools import find_packages, setup
 
-version = "1.2.0"
+version = "1.3.0"
 
 PACKAGE_ROOT = os.path.abspath(os.path.dirname(__file__))