Changed cache_handler.py to utilize Python's Context Management Protocol #18

	name: Unit tests

	on:
	push:
	pull_request:
	types: [synchronize]

	jobs:
	build:

	runs-on: ubuntu-20.04
	strategy:
	matrix:
	python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
	steps:
	- uses: actions/checkout@v4
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install .
	- name: Run unit tests
	run: \|
	python -m unittest discover -v tests/unit

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