Update mint and support IntoMint trait

[LPGhatguy]

In mint 0.5.8, the IntoMint trait was introduced. This trait helps users convert between math library types directly without having to name mint types themselves. More details on this trait are in kvark/mint#59 and kvark/mint#68.

This PR updates the mint minimum version to 0.5.8 and implements IntoMint for all types that have existing mint conversions.

[bitshifter]

Sorry, been busy the last couple of days and forgot to press the button. Looks like there's a test fail there. You can run these .sh files locally if that's easier.

[LPGhatguy]

Huh. The compilation error is with mint, not with the changes to glam. I wonder if rustc 1.51.0 is too old to work with the way the trait is defined.

I opened an issue for mint here because it seems there may not be a proper MSRV defined: kvark/mint#70

[bitshifter]

I'm not opposed to updating the MSRV if needed, it's a bit unclear what feature this needs.

[LPGhatguy]

It appears that mint requires a trait resolution change introduced in Rust 1.52.0. I don't see this documented in Rust's changelog.

I've introduced a PR for Mint, kvark/mint#71, which introduces a proper MSRV to prevent issues like this happening in the future. We've set the minimum version to 1.52.1.

[bitshifter]

This will get a lot easier with Rust 1.56 https://blog.rust-lang.org/2021/10/21/Rust-1.56.0.html#cargo-rust-version.It just came out though so not sure I want to jump on it straight away.

[bitshifter]

I updated glam's MSVR to 1.52.1,