build: update dependency less-loader to v13

See associated pull request for more information.

Author: angular-robot

packages/angular_devkit/build_angular/package.json

@@ -34,7 +34,7 @@
     "jsonc-parser": "3.3.1",
     "karma-source-map-support": "1.4.0",
     "less": "4.6.4",
-    "less-loader": "12.3.2",
+    "less-loader": "13.0.0",
     "license-webpack-plugin": "4.0.2",
     "loader-utils": "3.3.1",
     "mini-css-extract-plugin": "2.10.2",