Make `DecodeRaw` accept `ReadOnlyMemory<byte>`

[Crauzer]

DecodeRaw is currently a wrapper for DecodeRawInternal which itself accepts ReadOnlyMemory<byte>.
There is no reason why the public function shouldn't also accept ReadOnlyMemory/ReadOnlySpan.

[Crauzer]

I think issue also applies to the whole library, it would be much better to use the Memory/Span types for public APIs

[Nominom]

Hi,

Apologies for the late answer, but thanks for the suggestion!

I am actually reworking the public API for the next major version, because I'm not entirely happy with the current iteration either. The new API will definitely include methods for simple memory or span inputs as well.