Bump loader-utils from 1.4.0 to 1.4.2

Bumps [loader-utils](https://github.com/webpack/loader-utils) from 1.4.0 to 1.4.2.
- [Release notes](https://github.com/webpack/loader-utils/releases)
- [Changelog](https://github.com/webpack/loader-utils/blob/v1.4.2/CHANGELOG.md)
- [Commits](webpack/loader-utils@v1.4.0...v1.4.2)

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

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

Author: dependabot[bot]

packages/spectacle-mdx-loader/package.json

@@ -14,7 +14,7 @@
   "dependencies": {
     "@mdx-js/mdx": "^1.5.3",
     "gray-matter": "^4.0.2",
-    "loader-utils": "^1.2.3",
+    "loader-utils": "^1.4.2",
     "normalize-newline": "^3.0.0"
   },
   "scripts": {