add -O4 flag

Author: ecioppettini

.github/workflows/release.yaml

@@ -264,7 +264,7 @@ jobs:
         run: |
           gh release download version_101 --repo WebAssembly/binaryen --pattern '*-linux.tar.gz'
           tar -xzf binaryen*
-          ./binaryen-version_101/bin/wasm2js pkg/wallet_bg.wasm -o pkg/wallet_bg.js
+          ./binaryen-version_101/bin/wasm2js -O4 pkg/wallet_bg.wasm -o pkg/wallet_bg.js
           sed -i 's/wallet_bg.wasm/wallet_bg.js/' pkg/wallet_bg.js
           sed -i 's/wallet_bg.wasm/wallet_bg.js/' pkg/package.json
         working-directory: ./bindings/wallet-js