update some dev linting dependencies

package.json

@@ -65,9 +65,9 @@
     "nodemon": "2.0.4",
     "npm-audit-ci-wrapper": "3.0.1",
     "onchange": "6.1.1",
-    "postcss-cli": "6.1.3",
+    "postcss-cli": "^8.3.1",
     "redis-mock": "0.52.0",
-    "stylelint": "9.10.1",
+    "stylelint": "^13.13.1",
     "stylelint-config-standard": "18.3.0",
     "uglify-js": "3.11.5",
     "wdio-docker-service": "2.4.0",