Problem
cannot produce cdylib for the target wasm32-wasi

Steps

1. Add "cdylib" to the Cargo.toml, e.g.

   cargo new check-wasi && cd check-wasi
   echo "[lib]" >> Cargo.toml 
   echo "crate-type = [\"cdylib\"]" >> Cargo.toml
   

2. Build using

   cargo +nightly build --target=wasm32-wasi
   

3. Observe

   error: cannot produce cdylib for `check-wasi v0.1.0` as the target `wasm32-wasi` does not support these crate types
   

Possible Solution(s)
Allow cdylib for all wasm32-* targets: it's available for wasm32-unknown-unknown and is required by wasm-pack