Fix wasm build failure

Author: dalance

playground/Cargo.toml

@@ -41,3 +41,8 @@ opt-level = 3
 
 [profile.release.build-override]
 opt-level = 3
+
+# Workaround for Rust 1.87.0
+# https://github.com/rust-lang/rust/issues/141048
+[package.metadata.wasm-pack.profile.release]
+wasm-opt = ["-O","--enable-bulk-memory", "--enable-mutable-globals"]