chore(package): update stylelint-config-standard to version 15.0.1

https://greenkeeper.io/

package.json

@@ -250,7 +250,7 @@
     "sri-stats-webpack-plugin": "0.7.3",
     "style-loader": "0.13.1",
     "stylelint": "7.6.0",
-    "stylelint-config-standard": "14.0.0",
+    "stylelint-config-standard": "15.0.1",
     "supertest": "2.0.1",
     "supertest-as-promised": "4.0.2",
     "svg-url-loader": "1.1.0",