* changes without context

        autosynth cannot find the source of changes triggered by earlier changes in this
        repository, or by version upgrades to tools such as linters.

* chore: Add header checker config to python library synth

Now that we have it working in [python-docs-samples](https://.com/GoogleCloudPlatform/python-docs-samples/blob/master/./header-checker-lint.yml) we should consider adding it to the 🐍 libraries :)

Source-Author: Leah E. Cole <[email protected]>
Source-Date: Mon Jan 25 13:24:08 2021 -0800
Source-Repo: googleapis/synthtool
Source-Sha: 573f7655311b553a937f9123bee17bf78497db95
Source-Link: googleapis/synthtool@573f765

* chore: add noxfile parameters for extra dependencies

Also, add tests for some noxfile parameters for assurance that the
template generates valid Python.

Co-authored-by: Jeffrey Rennie <[email protected]>

Source-Author: Tim Swast <[email protected]>
Source-Date: Tue Jan 26 12:26:57 2021 -0600
Source-Repo: googleapis/synthtool
Source-Sha: 778d8beae28d6d87eb01fdc839a4b4d966ed2ebe
Source-Link: googleapis/synthtool@778d8be

* build: migrate to flakybot

Source-Author: Justin Beckwith <[email protected]>
Source-Date: Thu Jan 28 22:22:38 2021 -0800
Source-Repo: googleapis/synthtool
Source-Sha: d1bb9173100f62c0cfc8f3138b62241e7f47ca6a
Source-Link: googleapis/synthtool@d1bb917

* chore(python): include py.typed files in release

A py.typed file must be included in the released package for it to be considered typed by type checkers. https://www.python.org/dev/peps/pep-0561/#packaging-type-information. See googleapis/python-secret-manager#79

Source-Author: Bu Sun Kim <[email protected]>
Source-Date: Fri Feb 5 17:32:06 2021 -0700
Source-Repo: googleapis/synthtool
Source-Sha: 33366574ffb9e11737b3547eb6f020ecae0536e8
Source-Link: googleapis/synthtool@3336657

* docs: update python contributing guide

Adds details about blacken, updates version for system tests,
and shows how to pass through pytest arguments.

Source-Author: Chris Cotter <[email protected]>
Source-Date: Mon Feb 8 17:13:36 2021 -0500
Source-Repo: googleapis/synthtool
Source-Sha: 4679e7e415221f03ff2a71e3ffad75b9ec41d87e
Source-Link: googleapis/synthtool@4679e7e

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* chore: upgrade to gapic-generator-python 0.40.10

fix: ignore unknown fields returned from server for REST

Source-Author: Bu Sun Kim <[email protected]>
Source-Date: Thu Feb 25 21:29:43 2021 -0700
Source-Repo: googleapis/googleapis-discovery
Source-Sha: 3a6a0438c9143dcb7ecd26f90cc1688d6364d068
Source-Link: googleapis/googleapis-discovery@3a6a043

* chore: Add renovate.json

Source-Author: WhiteSource Renovate <[email protected]>
Source-Date: Fri Feb 26 05:48:14 2021 +0100
Source-Repo: googleapis/googleapis-discovery
Source-Sha: 806768fb4ee175390ce625331cdcb05293786c8f
Source-Link: googleapis/googleapis-discovery@806768f

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