Why python 3.7 for EVM?

[nullableVoidPtr]

Hi, I noticed in setup.py:

        "cached-property>=1.5.2;python_version<'3.8'",
        "typing-extensions>=3.7.4.3;python_version<'3.8'",

Is there any particular reason as to why EVM requires this particular version?

I didn't raise this as an issue as I am just wondering if there was something I am missing. I tried looking in CI for answers but I couldn't find any reason.

[nullableVoidPtr]

Pinging @xwings

[kabeor]

Well, these features are included in python3.8, and we use these packages for forward compatibility

[kabeor]

These packages are not required in environments greater than Python 3.8

[xwings]

I think its python library we rely too. feel free to test and let me know if we got it wrong.