fix: require python 3.7+ (#410)

* chore(python): drop python 3.6 Source-Link: googleapis/synthtool@4f89b13 Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:e7bb19d47c13839fe8c147e50e02e8b6cf5da8edd1af8b82208cd6f66cc2829c * require python 3.7+ in setup.py * remove python 3.6 sample configs * exclude templated README * remove python 3.6 from noxfile * remove python 3.6 from remaining files * remove testing/constraints-3.6.txt 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: sha256:81ed5ecdfc7cac5b699ba4537376f3563f6f04122c4ec9e735d3b3dc1d43dd32
-# created: 2022-05-05T22:08:23.383410683Z
+ digest: sha256:e7bb19d47c13839fe8c147e50e02e8b6cf5da8edd1af8b82208cd6f66cc2829c
+# created: 2022-07-05T18:31:20.838186805Z

.github/sync-repo-settings.yaml

@@ -11,12 +11,10 @@ branchProtectionRules:
  # No Kokoro: the following are Github actions
  - 'lint'
  - 'mypy'
- - 'unit-3.6'
  - 'unit-3.7'
  - 'unit-3.8'
  - 'unit-3.9'
  - 'unit-3.10'
- - 'unit_wo_grpc-3.6'
  - 'unit_wo_grpc-3.10'
  - 'cover'
  - 'docs'

.github/workflows/unittest.yml

@@ -13,7 +13,6 @@ jobs:
  matrix:
  option: ["", "_wo_grpc"]
  python:
- - "3.6"
  - "3.7"
  - "3.8"
  - "3.9"

.kokoro/continuous/prerelease-deps.cfg

@@ -0,0 +1,7 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Only run this nox session.
+env_vars: {
+ key: "NOX_SESSION"
+ value: "prerelease_deps"
+}

.kokoro/presubmit/prerelease-deps.cfg

@@ -0,0 +1,7 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Only run this nox session.
+env_vars: {
+ key: "NOX_SESSION"
+ value: "prerelease_deps"
+}