With the module linking proposal the field name on imports is now optional, and only the module is required to be specified. This commit propagates this API change to the boundary of wasmtime's API, ensuring consumers are aware of what's optional with module linking and what isn't. Note that it's expected that all existing users will either update accordingly or unwrap the result since module linking is presumably disabled.
This is the wasmtime-wast crate, which contains an implementation of WebAssembly's
"wast" test scripting language, which is used in the
WebAssembly spec testsuite, using wasmtime for execution.