ci: install wasm-pack using official installer (#98)

Author: goto-bus-stop

.github/workflows/ci.yml

@@ -77,10 +77,9 @@ jobs:
           profile: minimal
           toolchain: stable
           override: true
-      - uses: actions-rs/cargo@v1
-        with:
-          command: install
-          args: wasm-pack
+      - name: Install wasm-pack
+        run: |
+          curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
       - run: npm install
         working-directory: vscode
       - run: npm run package