`From<i32> for SwapInterval` should be panic-less `TryFrom<i32>` implementation

[KisaragiEffective]

Hi,

I've found that your implementation of From<i32> for SwapInterval panics if the given value is out of range. However, From trait seems not intended to be used with panic; I would like to purpose replace it with TryFrom<i32> implementation (this purpose is a breaking change).

[Cobrand]

Good idea, this functionality was added before TryFrom was introduced, this is why it was made that way.

[KisaragiEffective]

I cloudn't find your MSRV requirement, so it may be wise to introduce failable_conversion feature (not turned on by default) and deprecate the impl when it is opted-in.