test.yml run statement should fail early

Force the `run` script to fail early using bash shell
`set` options.

Previously, errors before the last statement of the script would be
ignored.

.github/workflows/test.yml

@@ -119,9 +119,11 @@ jobs:
         with:
           node-version: "12"
       - run: |
+          set -euxo pipefail
           export RUST_BACKTRACE=1
           curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
           wasm-pack --version
+        shell: bash
       - run: cargo build --target ${{ matrix.target }}  --color=always
 
   features_check_wasm: