Bump loader-utils from 2.0.3 to 2.0.4 in /webpack-plugin (#3425)

Bumps [loader-utils](https://github.com/webpack/loader-utils) from 2.0.3 to 2.0.4.
- [Release notes](https://github.com/webpack/loader-utils/releases)
- [Changelog](https://github.com/webpack/loader-utils/blob/v2.0.4/CHANGELOG.md)
- [Commits](https://github.com/webpack/loader-utils/compare/v2.0.3...v2.0.4)

---
updated-dependencies:
- dependency-name: loader-utils
  dependency-type: direct:production
...

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

webpack-plugin/package-lock.json

@@ -968,9 +968,9 @@
 			}
 		},
 		"node_modules/loader-utils": {
-			"version": "2.0.3",
-			"resolved": "https://registry.npmjs.org/loader-utils/-/loader-utils-2.0.3.tgz",
-			"integrity": "sha512-THWqIsn8QRnvLl0shHYVBN9syumU8pYWEHPTmkiVGd+7K5eFNVSY6AJhRvgGF70gg1Dz+l/k8WicvFCxdEs60A==",
+			"version": "2.0.4",
+			"resolved": "https://registry.npmjs.org/loader-utils/-/loader-utils-2.0.4.tgz",
+			"integrity": "sha512-xXqpXoINfFhgua9xiqD8fPFHgkoq1mmmpE92WlDbm9rNRd/EbRb+Gqf908T2DMfuHjjJlksiK2RbHVOdD/MqSw==",
 			"dependencies": {
 				"big.js": "^5.2.2",
 				"emojis-list": "^3.0.0",
@@ -2548,9 +2548,9 @@
 			"dev": true
 		},
 		"loader-utils": {
-			"version": "2.0.3",
-			"resolved": "https://registry.npmjs.org/loader-utils/-/loader-utils-2.0.3.tgz",
-			"integrity": "sha512-THWqIsn8QRnvLl0shHYVBN9syumU8pYWEHPTmkiVGd+7K5eFNVSY6AJhRvgGF70gg1Dz+l/k8WicvFCxdEs60A==",
+			"version": "2.0.4",
+			"resolved": "https://registry.npmjs.org/loader-utils/-/loader-utils-2.0.4.tgz",
+			"integrity": "sha512-xXqpXoINfFhgua9xiqD8fPFHgkoq1mmmpE92WlDbm9rNRd/EbRb+Gqf908T2DMfuHjjJlksiK2RbHVOdD/MqSw==",
 			"requires": {
 				"big.js": "^5.2.2",
 				"emojis-list": "^3.0.0",