use nightly for website

Author: bgkillas

.github/workflows/wasm.yml

@@ -23,7 +23,7 @@ jobs:
         run: cargo install wasm-pack
       - name: Install Binaryen (wasm-opt)
         run: |
-          BINARYEN_VERSION=version_123
+          BINARYEN_VERSION=$(curl -s https://api.github.com/repos/WebAssembly/binaryen/releases/latest | jq -r .tag_name)
           curl -L -O https://github.com/WebAssembly/binaryen/releases/download/${BINARYEN_VERSION}/binaryen-${BINARYEN_VERSION}-x86_64-linux.tar.gz
           tar -xzf binaryen-${BINARYEN_VERSION}-x86_64-linux.tar.gz
           echo "$(pwd)/binaryen-${BINARYEN_VERSION}/bin" >> $GITHUB_PATH
@@ -40,6 +40,7 @@ jobs:
 
       - name: Build WASM app
         run: |
+          export RUSTUP_TOOLCHAIN=nightly
           wasm-pack build --out-dir www/pkg --target web --release --no-default-features --features "wasm-draw"
           wasm-opt -O3   --enable-bulk-memory   --enable-nontrapping-float-to-int   -o www/pkg/kalc_plot_bg.wasm   www/pkg/kalc_plot_bg.wasm