Build(deps-dev): Bump @wasm-tool/wasm-pack-plugin from 0.3.0 to 0.4.2

Bumps [@wasm-tool/wasm-pack-plugin](https://github.com/wasm-tool/wasm-pack-plugin) from 0.3.0 to 0.4.2.
- [Release notes](https://github.com/wasm-tool/wasm-pack-plugin/releases)
- [Commits](https://github.com/wasm-tool/wasm-pack-plugin/commits)

Author: dependabot-preview[bot]

package-lock.json

@@ -12,7 +12,7 @@
     "create-rust-webpack": ".bin/create-rust-webpack.js"
   },
   "devDependencies": {
-    "@wasm-tool/wasm-pack-plugin": "0.3.0",
+    "@wasm-tool/wasm-pack-plugin": "0.4.2",
     "html-webpack-plugin": "^3.2.0",
     "webpack": "^4.31.0",
     "webpack-cli": "^3.3.2",