pyinstaller: fix CI on py<3.10 (#244)

pydrive2/__pyinstaller/test_hook-googleapiclient.py

@@ -3,12 +3,21 @@
 from PyInstaller import __main__ as pyi_main
 
 
-_APP_SOURCE = """import importlib.resources
+# NOTE: importlib.resources.contents is available in py3.7+, but due to how
+# pyinstaller handles importlib, we need to use the importlib_resources
+# backport if there are any resources methods that are not available in a given
+# python version, which ends up being py<3.10
+_APP_SOURCE = """
+import sys
+if sys.version_info >= (3, 10):
+    from importlib.resources import contents
+else:
+    from importlib_resources import contents
 
 import pydrive2.files
 
 
-cache_files = importlib.resources.contents(
+cache_files = contents(
     "googleapiclient.discovery_cache.documents"
 )
 assert len(cache_files) > 0

setup.py

@@ -9,6 +9,7 @@
     "flake8-docstrings",
     "pytest-mock",
     "pyinstaller",
+    "importlib_resources; python_version < '3.10'",
 ]
 
 tests_requirements.append("black==22.10.0")