set last task to None after migration if task no longer exists #171

	name: Unit Tests in Python 3.8, 3.9, 3.10, 3.11, 3.12

	on: [push]

	jobs:
	build:

	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]

	steps:
	- uses: actions/checkout@v3
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install ruff
	pip install .
	# - name: Lint with ruff
	# run: \|
	# stop the build if there are Python syntax errors or undefined names
	# ruff --format=github --select=E9,F63,F7,F82 --target-version=py37 .
	# default set of ruff rules with GitHub Annotations
	# ruff --format=github --target-version=py37 .
	- name: Run tests
	run: \|
	python -m unittest discover -v -s ./tests/SpiffWorkflow/ -p *Test.py

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