Update dependency babel-loader to v8.3.0 (#6509)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

package.json

@@ -133,7 +133,7 @@
 		"amphtml-validator": "1.0.35",
 		"archiver": "5.3.0",
 		"babel-eslint": "10.1.0",
-		"babel-loader": "8.2.2",
+		"babel-loader": "8.3.0",
 		"clean-css": "5.1.5",
 		"clean-webpack-plugin": "4.0.0",
 		"codemirror": "5.62.3",