add py.typed file

[ryanc-bs]

fixes #9

[mdavis-xyz]

My CICD was broken. I've just fixed it and merged those changes into your feature branch.

It seems moto made a backwards incompatible change that broke the unit tests for this library. To fix it I had to remove support for python 3.7. Do you use that version?

(Obviously this change is fine. I'm just interesting in getting CICD working for the next change someone makes.)

[ryanc-bs]

My CICD was broken. I've just fixed it and merged those changes into your feature branch.

It seems moto made a backwards incompatible change that broke the unit tests for this library. To fix it I had to remove support for python 3.7. Do you use that version?

(Obviously this change is fine. I'm just interesting in getting CICD working for the next change someone makes.)

Thanks for checking, no we use python 3.8 currently 👍

[mdavis-xyz]

I've just published the new version, 0.5, to pypi.