chore(deps-dev): bump copy-webpack-plugin from 5.0.4 to 12.0.2

Bumps [copy-webpack-plugin](https://github.com/webpack-contrib/copy-webpack-plugin) from 5.0.4 to 12.0.2.
- [Release notes](https://github.com/webpack-contrib/copy-webpack-plugin/releases)
- [Changelog](https://github.com/webpack-contrib/copy-webpack-plugin/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/copy-webpack-plugin@v5.0.4...v12.0.2)

---
updated-dependencies:
- dependency-name: copy-webpack-plugin
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -59,7 +59,7 @@
     "babel-loader": "^8.0.6",
     "babel-preset-gatsby": "^3.14.0",
     "chai": "^4.3.6",
-    "copy-webpack-plugin": "^5.0.4",
+    "copy-webpack-plugin": "^12.0.2",
     "css-hot-loader": "^1.4.4",
     "css-loader": "^3.2.0",
     "file-loader": "^4.2.0",