* chore: use gapic-generator-python 1.2.0

PiperOrigin-RevId: 467286830

Source-Link: googleapis/googleapis@e6e875a

Source-Link: googleapis/googleapis-gen@0295ea1
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiMDI5NWVhMTRkOWNkNGQ0N2RkYjIzYjllYmQzOWEzMWUyMDM1ZTI4ZiJ9

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: Anthonios Partheniou <partheniou@google.com>

…[autoapprove] (#789)

Source-Link: googleapis/synthtool@4826337
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:60a63eddf86c87395b4bb394fdddfe30f84a7726ee8fe0b758ea132c2106ac75

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

…d of `string_value` (#771)

* fix: if JsonObject serialized to None then return `null_value` instead of `string_value`

Co-authored-by: Astha Mohta <35952883+asthamohta@users.noreply.github.com>
Co-authored-by: Anthonios Partheniou <partheniou@google.com>
Co-authored-by: Ilya Gurov <gurovilya9@gmail.com>

* feat: Adds auto-generated CL for googleapis for jsonb

PiperOrigin-RevId: 470167051

Source-Link: googleapis/googleapis@343f52c

Source-Link: googleapis/googleapis-gen@a416799
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiYTQxNjc5OWEzNzI2OTkxMmZhMGNmZGUyNzljZTUwYjdjMzY3MGRiMSJ9

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Source-Link: googleapis/synthtool@c4dd595
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:ce3c1686bc81145c81dd269bd12c4025c6b275b22d14641358827334fddb1d72

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

🤖 I have created a release *beep* *boop*
---


## [3.20.0](v3.19.0...v3.20.0) (2022-08-30)


### Features

* Adds TypeAnnotationCode PG_JSONB ([#792](#792)) ([6a661d4](6a661d4))


### Bug Fixes

* if JsonObject serialized to None then return `null_value` instead of `string_value` ([#771](#771)) ([82170b5](82170b5))

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