Add Python 3.11 capability

[rickecon]

I don't remember where this breaks, but I remember it breaking when I tried it. I want FiscalSim to run on both Python 3.10 and Python 3.11 in the following two ways.

• [ ] (i) I want our fiscalsim-us-dev conda environment from environment.yml to work for Python 3.10 or 3.11. I want the following code change in environment.yml. setup.py already does this. Once the change is implemented, I want you to make sure that all the tests in make test run on your local machine in a fiscalsim-us-dev conda environment in which the Python version is 3.11.

  name: fiscalsim-us-dev
  dependencies:
  - python>=3.10,<3.12
  - pip

• [ ] (ii) I want our GH Actions CI tests in build_and_test.yml to run on all three operating systems (already does) and on Python 3.10 and 3.11 (currently only runs on Python 3.10). I want the build_and_test.yml code to be changed to the following, and must pass all the tests:

  name: Build and test [Python 3.10, 311]
  on: [push, pull_request]
  jobs:
  build:
  runs-on: ${{ matrix.os }}
  strategy:
    matrix:
      os: [ubuntu-latest, macos-latest, windows-latest]
      python-version: ["3.10", "3.11"]
  
  steps:
    - name: Checkout
      uses: actions/checkout@v4
      with:
        persist-credentials: false
    - name: Set up Python using Python ${{ matrix.python-version }}
      uses: actions/setup-python@v4
      with:
        python-version: ${{ matrix.python-version }}
    - name: Install package
      run: make install
    - name: Run tests
      run: make test
    - name: Upload coverage to Codecov
      uses: codecov/codecov-action@v3
      with:
        files: ./coverage.xml
        flags: unittests
        name: codecov-umbrella
        fail_ci_if_error: true
        verbose: true

cc: @ss7886