Remove mock requirement and update coveralls version #725

	name: Run Unit Tests

	on: [push, pull_request]

	jobs:
	unit-test:
	runs-on: ubuntu-20.04 # 20.04 to allow for Py 3.6
	strategy:
	fail-fast: false
	matrix:
	# Python versions on Rocky 8, Ubuntu 20.04, Rocky 9
	python-version: ['3.6', '3.8', '3.9']
	name: Python ${{ matrix.python-version }} test
	steps:
	- uses: actions/checkout@v4

	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	cache: 'pip'

	- name: Base requirements for SSM
	run: pip install -r requirements.txt

	- name: Additional requirements for the unit and coverage tests
	run: pip install -r requirements-test.txt

	- name: Pre-test set up
	run: \|
	export TMPDIR=$PWD/tmp
	mkdir $TMPDIR
	export PYTHONPATH=$PYTHONPATH:`pwd -P`
	cd test

	- name: Run unit tests
	run: coverage run --branch --source=ssm,bin -m unittest discover --buffer

	- name: Upload coverage to Codecov
	uses: codecov/codecov-action@v5

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