tests: fix for release candidates (and test on more versions of Python)

Fixes #146

Includes loosening the constraints on versions used to run tests in CI (e.g.
pytest, coverage) since the older versions don't seem to work on newer Python.
Specifically, coverage 6.2 bombs out with an error on Python 3.11)

.github/workflows/test.yml

@@ -24,11 +24,17 @@ jobs:
             os: "ubuntu-20.04"
           - python-version: "3.10.0"
             os: "ubuntu-20.04"
+          - python-version: "3.11.0"
+            os: "ubuntu-20.04"
+          - python-version: "3.12.0"
+            os: "ubuntu-20.04"
+          - python-version: "3.13.0-rc.2"
+            os: "ubuntu-20.04"
     runs-on: ${{ matrix.os }}
     steps:
       - name: "Checkout"
         uses: "actions/checkout@v3"
-      - uses: "actions/setup-python@v4"
+      - uses: "actions/setup-python@v5"
         with:
           python-version: '${{ matrix.python-version }}'
       - name: "Install bsdcpio"
@@ -47,7 +53,7 @@ jobs:
           )
       - name: "Install python dependencies"
         run: |
-          pip install ".[ci]"
+          pip install ".[dev,ci]"
       - name: "Run type checking"
         run: |
           mypy stream_zip --strict

pyproject.toml

@@ -33,9 +33,6 @@ dev = [
 ]
 ci = [
     "pycryptodome==3.10.1",
-    "coverage==6.2",
-    "pytest==7.0.1",
-    "pytest-cov==3.0.0",
     "stream-unzip==0.0.86",
     "pyzipper==0.3.6",
     # Type checking

test_stream_zip.py

@@ -3,8 +3,8 @@
 import asyncio
 import contextlib
 import os
-import platform
 import secrets
+import sys
 import stat
 import subprocess
 import zlib
@@ -1388,7 +1388,7 @@ async def test():
 
 
 @pytest.mark.skipif(
-    tuple(int(v) for v in platform.python_version().split('.')) < (3,7,0),
+    sys.version_info[:2] < (3,7,0),
     reason="contextvars are not supported before Python 3.7.0",
 )
 def test_copy_of_context_variable_available_in_iterable():