Update continuous_integration.yml

    strategy:

      fail-fast: false

      matrix:

       os: [ubuntu-latest, macos-latest]

       os: [ubuntu-latest]

       python-version: ["3.7", "3.8", "3.9"]

    services:

      postgres:

        image: postgis/postgis:10-2.5

        env:

          POSTGRES_PASSWORD: NotTheDefault

          POSTGRES_DB: postgres

        ports:

          - 35432:5432

        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5   

    defaults:

      run:

        shell: bash -l {0}

    steps:

      - uses: actions/checkout@v2

      - uses: conda-incubator/setup-miniconda@v2

      - name: Checkout Code

        uses: actions/checkout@v2

      - name: Setup ENV

        uses: conda-incubator/setup-miniconda@v2

        with:

          miniconda-version: "latest"

          mamba-verion: "*"

          mamba-version: "*"

          use-mamba: true

          channels: conda-forge, defaults

          channel-priority: true

      - name: Check build environment

        run: |

          conda list

      - name: Setup Test DB

        run: psql -c 'create database template_postgis;' -U postgres

      - name: Install Python Package

        run: |

          python setup.py install