Bump jetli/wasm-pack-action from 0.3.0 to 0.4.0

Bumps [jetli/wasm-pack-action](https://github.com/jetli/wasm-pack-action) from 0.3.0 to 0.4.0.
- [Release notes](https://github.com/jetli/wasm-pack-action/releases)
- [Commits](jetli/wasm-pack-action@v0.3.0...v0.4.0)

---
updated-dependencies:
- dependency-name: jetli/wasm-pack-action
  dependency-version: 0.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/main.yml

@@ -78,7 +78,7 @@ jobs:
       - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: nightly
-      - uses: jetli/wasm-pack-action@v0.3.0
+      - uses: jetli/wasm-pack-action@v0.4.0
         with:
           version: 'latest'
       - run: cd ensure_wasm && wasm-pack build --target web && wasm-pack test --node