makes use of the updated plugin for generating DocFX YAMLs

add a security policy

Closes #85

This PR migrates from autosynth to [owl-bot](https://github.com/googleapis/repo-automation-bots/blob/master/packages/owl-bot/README.md).

Post-Processor: gcr.io/repo-automation-bots/owlbot-python:latest@sha256:58c7342b0bccf85028100adaa3d856cb4a871c22ca9c01960d996e66c40548ce

Closes #1126
Source-Link: googleapis/synthtool@b91f129
Post-Processor: gcr.io/repo-automation-bots/owlbot-python:latest@sha256:b6169fc6a5207b11800a7c002d0c5c2bc6d82697185ca12e666f44031468cfcd

#127)

[![WhiteSource Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [pre-commit/pre-commit-hooks](https://togithub.com/pre-commit/pre-commit-hooks) | repository | major | `v3.4.0` -> `v4.0.1` |

---

### Release Notes

<details>
<summary>pre-commit/pre-commit-hooks</summary>

### [`v4.0.1`](https://togithub.com/pre-commit/pre-commit-hooks/releases/v4.0.1)

[Compare Source](https://togithub.com/pre-commit/pre-commit-hooks/compare/v4.0.0...v4.0.1)

##### Fixes

-   `check-shebang-scripts-are-executable` fix entry point.
    -   [#&#8203;602](https://togithub.com/pre-commit/pre-commit-hooks/issues/602) issue by [@&#8203;Person-93](https://togithub.com/Person-93).
    -   [#&#8203;603](https://togithub.com/pre-commit/pre-commit-hooks/issues/603) PR by [@&#8203;scop](https://togithub.com/scop).

### [`v4.0.0`](https://togithub.com/pre-commit/pre-commit-hooks/releases/v4.0.0)

[Compare Source](https://togithub.com/pre-commit/pre-commit-hooks/compare/v3.4.0...v4.0.0)

##### Features

-   `check-json`: report duplicate keys.
    -   [#&#8203;558](https://togithub.com/pre-commit/pre-commit-hooks/issues/558) PR by [@&#8203;AdityaKhursale](https://togithub.com/AdityaKhursale).
    -   [#&#8203;554](https://togithub.com/pre-commit/pre-commit-hooks/issues/554) issue by [@&#8203;adamchainz](https://togithub.com/adamchainz).
-   `no-commit-to-branch`: add `main` to default blocked branches.
    -   [#&#8203;565](https://togithub.com/pre-commit/pre-commit-hooks/issues/565) PR by [@&#8203;ndevenish](https://togithub.com/ndevenish).
-   `check-case-conflict`: check conflicts in directory names as well.
    -   [#&#8203;575](https://togithub.com/pre-commit/pre-commit-hooks/issues/575) PR by [@&#8203;slsyy](https://togithub.com/slsyy).
    -   [#&#8203;70](https://togithub.com/pre-commit/pre-commit-hooks/issues/70) issue by [@&#8203;andyjack](https://togithub.com/andyjack).
-   `check-vcs-permalinks`: forbid other branch names.
    -   [#&#8203;582](https://togithub.com/pre-commit/pre-commit-hooks/issues/582) PR by [@&#8203;jack1142](https://togithub.com/jack1142).
    -   [#&#8203;581](https://togithub.com/pre-commit/pre-commit-hooks/issues/581) issue by [@&#8203;jack1142](https://togithub.com/jack1142).
-   `check-shebang-scripts-are-executable`: new hook which ensures shebang'd scripts are executable.
    -   [#&#8203;545](https://togithub.com/pre-commit/pre-commit-hooks/issues/545) PR by [@&#8203;scop](https://togithub.com/scop).

##### Fixes

-   `check-executables-have-shebangs`: Short circuit shebang lookup on windows.
    -   [#&#8203;544](https://togithub.com/pre-commit/pre-commit-hooks/issues/544) PR by [@&#8203;scop](https://togithub.com/scop).
-   `requirements-txt-fixer`: Fix comments which have indentation
    -   [#&#8203;549](https://togithub.com/pre-commit/pre-commit-hooks/issues/549) PR by [@&#8203;greshilov](https://togithub.com/greshilov).
    -   [#&#8203;548](https://togithub.com/pre-commit/pre-commit-hooks/issues/548) issue by [@&#8203;greshilov](https://togithub.com/greshilov).
-   `pretty-format-json`: write to stdout using UTF-8 encoding.
    -   [#&#8203;571](https://togithub.com/pre-commit/pre-commit-hooks/issues/571) PR by [@&#8203;jack1142](https://togithub.com/jack1142).
    -   [#&#8203;570](https://togithub.com/pre-commit/pre-commit-hooks/issues/570) issue by [@&#8203;jack1142](https://togithub.com/jack1142).
-   Use more inclusive language.
    -   [#&#8203;599](https://togithub.com/pre-commit/pre-commit-hooks/issues/599) PR by [@&#8203;asottile](https://togithub.com/asottile).

##### Breaking changes

-   Remove deprecated hooks: `flake8`, `pyflakes`, `autopep8-wrapper`.
    -   [#&#8203;597](https://togithub.com/pre-commit/pre-commit-hooks/issues/597) PR by [@&#8203;asottile](https://togithub.com/asottile).

</details>

---

### Configuration

📅 **Schedule**: At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻️ **Rebasing**: Renovate will not automatically rebase this PR, because other commits have been found.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box.

---

This PR has been generated by [WhiteSource Renovate](https://renovate.whitesourcesoftware.com). View repository job log [here](https://app.renovatebot.com/dashboard#github/googleapis/synthtool).
Source-Link: googleapis/synthtool@333fd90
Post-Processor: gcr.io/repo-automation-bots/owlbot-python:latest@sha256:b8c131c558606d3cea6e18f8e87befbd448c1482319b0db3c5d5388fa6ea72e3

* chore: move non-cloud package to staging bucket

* chore: update Kokoro config

* chore: update Owlbot.py

* 🦉 Updates from OwlBot

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

* 🦉 Updates from OwlBot

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

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

Source-Link: googleapis/synthtool@b0eb8a8
Post-Processor: gcr.io/repo-automation-bots/owlbot-python:latest@sha256:df50e8d462f86d6bcb42f27ecad55bb12c404f1c65de9c6fe4c4d25120080bd6

Source-Link: googleapis/synthtool@26558ba
Post-Processor: gcr.io/repo-automation-bots/owlbot-python:latest@sha256:99d90d097e4a4710cc8658ee0b5b963f4426d0e424819787c3ac1405c9a26719

chore: Update CONTRIBUTING.rst to reflect supported versions

Source-Link: googleapis/synthtool@53ea389
Post-Processor: gcr.io/repo-automation-bots/owlbot-python:latest@sha256:e1793a23ae0ee9aafb2e3a53b564a351f74790dbe3c2d75f8fc3b8c43e5c036c

Source-Link: googleapis/synthtool@e44dc0c
Post-Processor: gcr.io/repo-automation-bots/owlbot-python:latest@sha256:5ff7446edeaede81c3ed58b23a4e76a5403fba1350ce28478045657303b6479d

Source-Link: googleapis/synthtool@52e4e46
Post-Processor: gcr.io/repo-automation-bots/owlbot-python:latest@sha256:6186535cbdbf6b9fe61f00294929221d060634dae4a0795c1cefdbc995b2d605

Source-Link: googleapis/synthtool@dd05f9d
Post-Processor: gcr.io/repo-automation-bots/owlbot-python:latest@sha256:aea14a583128771ae8aefa364e1652f3c56070168ef31beb203534222d842b8b

Release-As: 0.4.5

🤖 I have created a release \*beep\* \*boop\*
---
### [0.4.5](https://www.github.com/googleapis/google-auth-library-python-oauthlib/compare/v0.4.4...v0.4.5) (2021-07-26)


### Documentation

* fix links to installed app, client secrets docs ([#86](https://www.github.com/googleapis/google-auth-library-python-oauthlib/issues/86)) ([e8e5dbb](https://www.github.com/googleapis/google-auth-library-python-oauthlib/commit/e8e5dbbf0b118fc68a9b60b91f0075f84908b6f6)), closes [#85](https://www.github.com/googleapis/google-auth-library-python-oauthlib/issues/85)
* omit mention of Python 2.7 in 'CONTRIBUTING.rst' ([#1127](https://www.github.com/googleapis/google-auth-library-python-oauthlib/issues/1127)) ([#126](https://www.github.com/googleapis/google-auth-library-python-oauthlib/issues/126)) ([8806324](https://www.github.com/googleapis/google-auth-library-python-oauthlib/commit/8806324428b5aebe6659c49a16066afafbe4d400)), closes [#1126](https://www.github.com/googleapis/google-auth-library-python-oauthlib/issues/1126)
* add Samples section to CONTRIBUTING.rst ([#134](https://www.github.com/googleapis/google-auth-library-python-oauthlib/issues/134)) ([1599a97](https://www.github.com/googleapis/google-auth-library-python-oauthlib/commit/1599a97831bbe1c15cf5a0d257817967c1cd227f))


### Miscellaneous Chores

* release as 0.4.5 ([#137](https://www.github.com/googleapis/google-auth-library-python-oauthlib/issues/137)) ([a54f283](https://www.github.com/googleapis/google-auth-library-python-oauthlib/commit/a54f283ee7854367ff289ee863a7404692f31099))
---


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