No need to require backports.zoneinfo on Python 3.9+

[gitpushdashf]

backports.zoneinfo on Python 3.9+ has to be compiled, so can't install in say the python:3.9-slim image.

pganssle/zoneinfo#105

I opened a PR, but got this big notice about signing a CLA. It's a very simple PR and I'm not sure if you can merge PRs here.

Feel free to reuse the two changed lines (if they even work) any way you please.

#36

Thank you! Let me know if you have any questions.

[Cam2337]

Thanks @gitpushdashf ! :)

Adding the guard to the installation in addition to our existing try/catch around our import statements makes sense!

I opened a PR, but got this big notice about signing a CLA. It's a very simple PR and I'm not sure if you can merge PRs here.

Feel free to reuse the two changed lines (if they even work) any way you please.

Unfortunately we don't have the ability to accept external PRs at the moment. I can incorporate+test this change and will push back to Github.

Thank you again!!

[gitpushdashf]

Great! Thank you so much!