Fix non-deterministic test
Currently wasm-bindgen's tests output JS code that is not deterministic and fails the build. Log can be found at https://archriscv.felixc.at/.status/log.htm?url=logs/wasm-bindgen/wasm-bindgen-0.2.95-1.log (this can be reproduced also on Arch Linux x86_64). Backporting https://github.com/rustwasm/wasm-bindgen/pull/4190 fixes the issue.