fix: typing for python 3.9

[JustRedTTG]

A quick fix to dd support for python 3.9 typing
Fixes: #31

[nilslice]

LGTM! Thank you, @JustRedTTG !

I'd like @chrisdickinson to just do a quick pass before we merge, to be sure there aren't side effects here that I (a Python noob) am unaware of.

[JustRedTTG]

LGTM! Thank you, @JustRedTTG !

I'd like @chrisdickinson to just do a quick pass before we merge, to be sure there aren't side effects here that I (a Python noob) am unaware of.

Hey still waiting, everything should be good, I only changed like two lines of code haha. Waiting on @chrisdickinson then. Just came in to bump this

[chrisdickinson]

Aha, apologies! We only build the extism_sys native dep for python 3.10, so I'm kind of surprised to see the CI working against 3.9. I had meant to dig further into that this week –to make sure that python 3.9 worked generally– but got sidetracked.

[chrisdickinson]

(I've now re-loaded the context in my head: this project is on 3.8 so bumping things to 3.9 won't cause any new incompat issues. Merging!)