Use Python 3.10 in the playground

[isidentical]

It seems like the project is still using 3.8, but it is causing some problems when experimenting with new syntax. I wonder whether we can bump it to Python 3.10?

[jpadilla]

Can easily bump today to 3.9 since its a supported lambda runtime. 3.10 would require a custom docker image and I most likely wouldnt get to it for a bit.

[isidentical]

That works, 3.10 would be also important for the new users of pattern matching but it is not urgent at all. Thanks!

[jpadilla]

done in 97bf2f5

[ilyagr]

black running on 3.9 cannot format code with Python 3.10's pattern matching syntax as discussed in psf/black#2242 (comment).

Is there any change 3.10 is a supported lambda runtime by now?

[ilyagr]

I found that checking "Skip temporary sanity checks." makes the playground format Python code with match statements. I'm not sure if that formatting is what it's supposed to be, but it worked well enough for me.