Reapply "Merge pull request #633 from cherrypy/debt/drop-py37"

This reverts commit 688fc83.

.github/workflows/ci-cd.yml

@@ -66,7 +66,6 @@ env:
   PRE_COMMIT_COLOR: always
   PY_COLORS: 1  # Recognized by the `py` package, dependency of `pytest`
   PYTHONIOENCODING: utf-8
-  PYTHONLEGACYWINDOWSSTDIO: 1  # Python 3.6 hack
   PYTHONUTF8: 1
   TOX_PARALLEL_NO_SPINNER: 1
   TOX_TESTENV_PASSENV: >-  # Make tox-wrapped tools see color requests
@@ -912,46 +911,13 @@ jobs:
           3.10
         - 3.9
         - 3.8
-        - pypy-3.7
-        - 3.7
-        - 3.6
-        - pypy-3.6
         os:
         - ubuntu-22.04
         - ubuntu-20.04
         - macos-11.0
         - macos-latest
         - windows-2019
         - windows-2022
-        exclude:
-        # NOTE: Windows PyPy jobs are excluded to address the tox bug
-        # NOTE: https://github.com/tox-dev/tox/issues/1704.
-        # NOTE: They should be re-added once it's fixed.
-        - os: windows-2022
-          python-version: pypy-3.6
-        - os: windows-2019
-          python-version: pypy-3.6
-        # NOTE: Windows PyPy 3.7 jobs are excluded because of the lack
-        # NOTE: of the build deps to compile cryptography.
-        # NOTE: They should be re-added once it's fixed.
-        - os: windows-2022
-          python-version: pypy-3.7
-        - os: windows-2019
-          python-version: pypy-3.7
-        # NOTE: macOS PyPy jobs are excluded because installing cryptography
-        # NOTE: needs openssl headers that aren't present at the moment.
-        # TODO: Remove the exclusions once this is addressed.
-        - os: macOS-11.0
-          python-version: pypy-3.6
-        - os: macos-latest
-          python-version: pypy-3.6
-        - os: macos-11.0
-          python-version: pypy-3.7
-        - os: macos-latest
-          python-version: pypy-3.7
-        # NOTE: Python 3.6 is not available for Ubuntu 22.04
-        - os: ubuntu-22.04
-          python-version: 3.6
 
     continue-on-error: >-
       ${{
@@ -1055,16 +1021,6 @@ jobs:
         --user
         '${{ env.TOX_VERSION }}'
 
-    - name: Patch tox.ini for Python 3.6 under Windows
-      if: >-
-        runner.os == 'Windows'
-        && matrix.python-version == '3.6'
-      run: >-
-        sed -i
-        's/^package_env\(\s\)\?=.*/package_env = py36-win-dummy/g'
-        tox.ini
-      shell: bash
-
     - name: Download all the dists
       uses: actions/download-artifact@v3
       with: