Update dependency css-loader to v7

Author: renovate[bot]

package.json

@@ -61,7 +61,7 @@
     "@wordpress/block-library": "3.2.21",
     "babel-loader": "8.4.1",
     "browserify-transform-tools": "1.7.0",
-    "css-loader": "5.2.7",
+    "css-loader": "7.1.2",
     "cssnano": "5.1.15",
     "eliminate": "1.1.2",
     "eslint": "8.33.0",