Update dependency stylelint to v13.13.1

package.json

@@ -112,7 +112,7 @@
     "shelljs": "0.8.5",
     "sinon": "2.4.1",
     "sinon-chai": "2.14.0",
-    "stylelint": "13.6.1",
+    "stylelint": "13.13.1",
     "stylelint-config-standard": "20.0.0",
     "stylelint-rscss": "0.4.0",
     "url-loader": "1.1.2",