Update CI matrix to include ansible-core's stable-2.12 branch (#52)

* Update CI matrix to include ansible-core's stable-2.12 branch.

* Adjust README.

.github/workflows/ansible-test.yml

@@ -24,6 +24,7 @@ jobs:
           - stable-2.9
           - stable-2.10
           - stable-2.11
+          - stable-2.12
           - devel
     runs-on: ubuntu-latest
     steps:
@@ -75,6 +76,7 @@ jobs:
           - stable-2.9
           - stable-2.10
           - stable-2.11
+          - stable-2.12
           - devel
 
     steps:
@@ -110,77 +112,3 @@ jobs:
       - uses: codecov/codecov-action@v1
         with:
           fail_ci_if_error: false
-
-###
-# Integration tests (RECOMMENDED)
-#
-# https://docs.ansible.com/ansible/latest/dev_guide/testing_integration.html
-
-
-# If the application you are testing is available as a docker container and you want to test
-# multiple versions see the following for an example:
-# https://github.com/ansible-collections/community.zabbix/tree/master/.github/workflows
-
-#  integration:
-#    runs-on: ubuntu-latest
-#    name: I (Ⓐ${{ matrix.ansible }}+py${{ matrix.python }}})
-#    strategy:
-#      fail-fast: false
-#      matrix:
-#        ansible:
-#          - stable-2.9
-#          - stable-2.10
-#          - stable-2.11
-#          - devel
-#        python:
-#          - 2.6
-#          - 2.7
-#          - 3.5
-#          - 3.6
-#          - 3.7
-#          - 3.8
-#          - 3.9
-#          - "3.10"
-#        exclude:
-#          - ansible: stable-2.9
-#            python: 3.9
-#          - ansible: stable-2.9
-#            python: "3.10"
-#          - ansible: stable-2.10
-#            python: "3.10"
-#          - ansible: stable-2.11
-#            python: "3.10"
-#
-#    steps:
-#      - name: Check out code
-#        uses: actions/checkout@v2
-#        with:
-#          path: ansible_collections/community/routeros
-#
-#      - name: Set up Python ${{ matrix.ansible }}
-#        uses: actions/setup-python@v2
-#        with:
-#          python-version: 3.8
-#
-#      - name: Install ansible-base (${{ matrix.ansible }})
-#        run: pip install https://github.com/ansible/ansible/archive/${{ matrix.ansible }}.tar.gz --disable-pip-version-check
-#
-#      - name: Install collection dependencies
-#        run: git clone --depth=1 --single-branch https://github.com/ansible-collections/ansible.netcommon.git ansible_collections/ansible/netcommon
-#        # NOTE: we're installing with git to work around Galaxy being a huge PITA (https://github.com/ansible/galaxy/issues/2429)
-#        # run: ansible-galaxy collection install ansible.netcommon -p .
-#
-#      # Run the integration tests
-#      - name: Run integration test
-#        run: ansible-test integration -v --color --retry-on-error --continue-on-error --diff --python ${{ matrix.python }} --docker --coverage
-#        working-directory: ./ansible_collections/community/routeros
-#
-#        # ansible-test support producing code coverage date
-#      - name: Generate coverage report
-#        run: ansible-test coverage xml -v --requirements --group-by command --group-by version
-#        working-directory: ./ansible_collections/community/routeros
-#
-#      # See the reports at https://codecov.io/gh/ansible_collections/ansible-collections/community.routeros
-#      - uses: codecov/codecov-action@v1
-#        with:
-#          fail_ci_if_error: false