Add array blanket implementations.

[TannerRogalsky]

Mirrors the slice implementation. Improves ergonomics when comparing arrays.

[brendanzab]

Oooh, nice! I wonder if we should put this under a feature flag 🤔 - approx is used pretty widely and I'm not sure how disruptive a MSRV bump would be to the ecosystem.

I also see that we're using Travis CI still - might need to switch to Github Actions 😅

[TannerRogalsky]

@brendanzab Can't hurt. I've added an array_impl that is not enabled by default.

[RReverser]

Would love to see this merged to get rid of all the &arr[..] in approx calls.

[kanerogers]

Hey there! Just giving this one a gentle bump! Anything else needed to get this closed?

wrt MSRV bump, might make sense to just bump the version to 0.6?

[jonaspleyer]

Hey there. I have forked the approx crate under https://crates.io/crates/approxim. I have already included many PRs of the original approx crate such as #57, #67, #69, #83, #87, #90, #91, #92. As you can see, this PR was included as well. This new crate approxim should work as a drop-in-replacement for approx. Feel free to try it out and let me know what you think.