Update dependency stylus-loader to v7.1.3

Author: renovate[bot]

package-lock.json

@@ -26,7 +26,7 @@
     "@vue/cli-plugin-pwa": "5.0.8",
     "@vue/cli-service": "5.0.8",
     "stylus": "0.59.0",
-    "stylus-loader": "7.1.0",
+    "stylus-loader": "7.1.3",
     "vue-cli-plugin-vuetify": "2.5.5",
     "vue-template-compiler": "2.7.8",
     "vuetify-loader": "1.9.2"