Add tests for various tiff file types

[kylebarron]

@geospatial-jeff @vincentsarago have thoughts for good ways to test a variety of TIFFs? Something like https://github.com/cogeotiff/cog-fixtures?

[kylebarron]

There are also a bunch of files upstream: https://github.com/image-rs/image-tiff/tree/master/tests

[kylebarron]

@maxrjones Not urgent, but maybe if you have some time down the line, you might be interested in implementing some tests on the Rust side? It doesn't look too hard to port some of the upstream tests like: https://github.com/image-rs/image-tiff/blob/master/tests/decode_bigtiff_images.rs

[vincentsarago]

in rio-tiler I use a pytest fixture https://github.com/cogeotiff/rio-tiler/blob/7db311c4dd0a839d6fb7634d5891979fea456935/tests/conftest.py#L26-L118 and then a matrix https://github.com/cogeotiff/rio-tiler/blob/7db311c4dd0a839d6fb7634d5891979fea456935/tests/benchmarks/benchmarks.py#L78-L81 to create a lot fixtures dataset 😅

[kylebarron]

Progress on the rust side with #28