enable Python 3.6.9

Author: sgserg

pyfcm/baseapi.py

@@ -1,4 +1,4 @@
-from __future__ import annotations
+#from __future__ import annotations
 
 import json
 import os
@@ -28,13 +28,13 @@ class BaseAPI(object):
 
     def __init__(
         self,
-        service_account_file: str | None,
+        service_account_file: str,
         project_id: str,
         credentials=None,
         proxy_dict=None,
         env=None,
         json_encoder=None,
-        adapter=None,
+        adapter=None
     ):
         """
         Override existing init function to give ability to use v1 endpoints of Firebase Cloud Messaging API

setup.py

@@ -15,7 +15,7 @@ def read(fname):
     return open(os.path.join(os.path.dirname(__file__), fname)).read()
 
 
-install_requires = ["requests", "urllib3>=1.26.0", "google-auth>=2.29.0"]
+install_requires = ["requests", "urllib3>=1.26.0", "google-auth>=2.22.0", "aiohttp==3.8.6"]
 tests_require = ["pytest"]
 
 # We can't get the values using `from pyfcm import __meta__`, because this would import