Upgrade dependencies except "approx"

[nyurik]

Upgrade all proj-sys and proj dependency versions to the latest. For consistency all versions are fully-specified. The only exception is the approx lib because the trait is implemented upstream in geo-types. Perhaps if we change geo-types to use approx = "*", it could work?

It is fairly easy to upgrade them now using cargo upgrade. I usually run it in offline mode due to an issue

cargo update && cargo upgrade --offline --workspace

[frewsxcv]

bors r+

[bors[bot]]

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