`ptr::cast` has the advantage of being unable to silently cast `*const T` to `*mut T`. This turned up several places that were performing such casts, which this PR also fixes.
Wasmtime Embedding API
The wasmtime crate is an embedding API of the wasmtime WebAssembly runtime.
This is intended to be used in Rust projects and provides a high-level API of
working with WebAssembly modules.
If you're interested in embedding wasmtime in other languages, you may wish to
take a look a the C embedding API instead!