Upgrade for newer Python version and fix for broadcast can't send issue#250

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sanlinnaing wants to merge 6 commits intodcai:masterfrom

sanlinnaing:master

Commits on Oct 8, 2024

some of lint warning fixing and code refactor for readability
sanlinnaing
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Fixed #238 issue that can't send broadcast message due to device type check for ios-fcm
sanlinnaing
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Pipenv rebuild to support newer Python version >=3.9 on upcomming commits. Python version upgrade started here.
sanlinnaing
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oauth2client is migrated to google-auth to support newer python version >=3.9
sanlinnaing
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migrated depricated `hyper` lib with `httpx` for http2 client to send APNs api for supporting python newer version >= 3.9
sanlinnaing
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pymongo is upgraded to newer version >= 4.x to support upcomming MongoDB and Python
sanlinnaing
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