Set minimum version of aiohttp and enfore Python 3.6+ when using async methods

Author: aaront-geotab

setup.py

@@ -37,7 +37,7 @@
     url="https://github.com/geotab/mygeotab-python",
     description="An unofficial Python client for the MyGeotab API",
     long_description=readme + "\n\n" + changelog,
-    extras_require={"notebook": ["pandas"], ":python_version>='3.5'": ["aiohttp", "python-rapidjson"]},
+    extras_require={"notebook": ["pandas"], ":python_version>='3.6'": ["aiohttp>=3.8.1,<4", "python-rapidjson"]},
     test_suite="tests",
     include_package_data=True,
     packages=packages,