feat: smallvec 2.0.0 #21
Draft
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smallvec recently released an alpha version for 2.0.0 which finally supports
const genericsby default. This PR includes the minimal needed changes to use the new API + removes/deprecates theunionfeature, since it is not longer needed after rust 1.49. I'm gonna mark this as adraft, until v2 actually comes out; it might take a while, but I wanted to start refactoring some of my crates 😅.Also, it might be worth looking into modernizing the crate (adding new features or rewriting previous code), since the msrv got bumped to 1.57, but that could be done on a completely different PR.