update open-cv dips & reqs

[jGaboardi]

update open-cv deps & reqs -- #61

• [x] pyproject.toml
• [x] ci/
• [x] environment.yaml

xref for failures due to bad open-cv builds:

• https://github.com/uscuni/simplification/actions/runs/9438804279
• https://github.com/uscuni/simplification/actions/runs/9438804402

More info on SO:

• https://stackoverflow.com/questions/67120450/error-2unspecified-error-the-function-is-not-implemented-rebuild-the-libra
• https://stackoverflow.com/questions/55313610/importerror-libgl-so-1-cannot-open-shared-object-file-no-such-file-or-directo