fix: require python 3.7+ (#613)

* chore(python): drop python 3.6 Source-Link: googleapis/synthtool@4f89b13 Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:e7bb19d47c13839fe8c147e50e02e8b6cf5da8edd1af8b82208cd6f66cc2829c * add api_description to .repo-metadata.json * require python 3.7+ in setup.py * remove python 3.6 sample configs * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md * remove python 3.6 from noxfile.py * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md * remove python 3.6 specific code * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md * lint * lint Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com> Co-authored-by: Anthonios Partheniou <partheniou@google.com>

Author: gcf-owl-bot[bot]

.github/.OwlBot.lock.yaml

@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
  image: gcr.io/cloud-devrel-public-resources/owlbot-python:latest
- digest: sha256:b2dc5f80edcf5d4486c39068c9fa11f7f851d9568eea4dcba130f994ea9b5e97
-# created: 2022-06-12T16:09:31.61859086Z
+ digest: sha256:e7bb19d47c13839fe8c147e50e02e8b6cf5da8edd1af8b82208cd6f66cc2829c
+# created: 2022-07-05T18:31:20.838186805Z

.github/workflows/unittest.yml

@@ -8,7 +8,7 @@ jobs:
  runs-on: ubuntu-latest
  strategy:
  matrix:
- python: ['3.6', '3.7', '3.8', '3.9', '3.10']
+ python: ['3.7', '3.8', '3.9', '3.10']
  steps:
  - name: Checkout
  uses: actions/checkout@v3

.kokoro/samples/python3.6/common.cfg

@@ -33,7 +33,7 @@ export PYTHONUNBUFFERED=1
 env | grep KOKORO
 
 # Install nox
-python3.6 -m pip install --upgrade --quiet nox
+python3.9 -m pip install --upgrade --quiet nox
 
 # Use secrets acessor service account to get secrets
 if [[ -f "${KOKORO_GFILE_DIR}/secrets_viewer_service_account.json" ]]; then
@@ -76,7 +76,7 @@ for file in samples/**/requirements.txt; do
  echo "------------------------------------------------------------"
 
  # Use nox to execute the tests for the project.
- python3.6 -m nox -s "$RUN_TESTS_SESSION"
+ python3.9 -m nox -s "$RUN_TESTS_SESSION"
  EXIT=$?
 
  # If this is a periodic build, send the test log to the FlakyBot.

.kokoro/samples/python3.6/continuous.cfg

@@ -13,5 +13,6 @@
  "requires_billing": true,
  "default_version": "v1",
  "codeowner_team": "@googleapis/api-firestore",
- "api_shortname": "firestore"
+ "api_shortname": "firestore",
+ "api_description": "is a fully-managed NoSQL document database for mobile, web, and server development from Firebase and Google Cloud Platform. It's backed by a multi-region replicated database that ensures once data is committed, it's durable even in the face of unexpected disasters. Not only that, but despite being a distributed database, it's also strongly consistent and offers seamless integration with other Firebase and Google Cloud Platform products, including Google Cloud Functions."
 }

.kokoro/samples/python3.6/periodic-head.cfg

@@ -22,7 +22,7 @@ In order to add a feature:
  documentation.
 
 - The feature must work fully on the following CPython versions:
- 3.6, 3.7, 3.8, 3.9 and 3.10 on both UNIX and Windows.
+ 3.7, 3.8, 3.9 and 3.10 on both UNIX and Windows.
 
 - The feature must not add unnecessary dependencies (where
  "unnecessary" is of course subjective, but new dependencies should
@@ -231,13 +231,11 @@ Supported Python Versions
 
 We support:
 
-- `Python 3.6`_
 - `Python 3.7`_
 - `Python 3.8`_
 - `Python 3.9`_
 - `Python 3.10`_
 
-.. _Python 3.6: https://docs.python.org/3.6/
 .. _Python 3.7: https://docs.python.org/3.7/
 .. _Python 3.8: https://docs.python.org/3.8/
 .. _Python 3.9: https://docs.python.org/3.9/
@@ -249,7 +247,7 @@ Supported versions can be found in our ``noxfile.py`` `config`_.
 .. _config: https://github.com/googleapis/python-firestore/blob/main/noxfile.py
 
 
-We also explicitly decided to support Python 3 beginning with version 3.6.
+We also explicitly decided to support Python 3 beginning with version 3.7.
 Reasons for this include:
 
 - Encouraging use of newest versions of Python 3