No support for unsigned types in external functions

[olonho]

When using Linker.func with function with signature fn(u64, u64) -> i32 get this error

the trait wasmtime::func::IntoFunc<_, _> is not implemented for fn(u64, u64) -> i32

It is important to use unsigned types in external functions in many cases.

[alexcrichton]

I think this was added pretty recently in #1808, mind trying that out and seeing if that works for you?

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[alexcrichton]

I believe this has since been added so closing.