[rasterio] 1.5.1 support (BLOCKED)

[jack-volantautonomy]

rasterio has now released version 1.5.1 and as a result affine has now released version 3.0.0 with py.typed implemented so we should move to properly typing Affine with this update.

BLOCKED
Currently blocked by stub_uploader not allowing affine usage. I have a PR created there that should allow this to work as can be seen here:

• Add affine to allowlist typeshed-internal/stub_uploader#223

[jack-volantautonomy]

@thomas-maschler I know your away from computer at the moment so won't be able to properly verify, but is this as simple a fix as it should be or is more work required?

[thomas-maschler]

Is there a better option than Any? Can the return type be str?

[jack-volantautonomy]

I would like for it to be better than Any but sadly the function is brutally simple:

@singledispatch
def to_json(obj):
    """Convert obj to a JSON serializable form."""
    return obj

I guess typing using an unbound Generic would be more effective @thomas-maschler?

[jack-volantautonomy]

Nope, just looked into it a bit more and singledispatch is already typed in typeshed to tell us this so we'd basically be having a generic typing inside of typing with Callable and generic already. Looks like if we want better typing than Any the next best alternative is object so I've made that change now.