Cargo.tomlto add the Wasmer dependencies as shown below:
WasmPtras its first return value. This
WasmPtris what will give us the ability to interact with the memory.
helloexported function: it will return what we'll call a pointer.
loadfunction gave us its length. We have everything we need!
Cells: we want this slice to be the size of the new string starting at the same offset as our pointer. This allows us to completely overwrite the old string with the new one.