Support ReadOnlySpan<byte> input for Disassemble

[darkf]

It would let us use memory from anywhere (including other native pointers) and Span<byte>s without copying to a byte[] array. It makes it more in-line with the standard library which often supports both, too.

[9ee1]

Hello. ReadOnlySpan<T> is only supported on .NET Core right now. It is not supported on .NET Standard, which is the target framework the library currently targets when it compiles. I would either have to add .NET Core as an extra target framework and conditionally compile an overload that accepts a ReadOnlySpan<T> as an argument or wait until .NET Standard 2.1 is released, which will support ReadOnlySpan<T>. Let me explore those options and get back to you.

[ds5678]

The System.Memory package backports it to .NET Standard, so conditional compilation would be unnecessary.

https://www.nuget.org/packages/System.Memory/#supportedframeworks-body-tab

[ds5678]

I took a brief look into the issue, and the use of delegates seems to be the primary barrier to ReadOnlySpan<byte> support.