Merge pull request #343 from pmarsceill/dependabot/npm_and_yarn/stylelint-13.6.1

Bump stylelint from 13.3.3 to 13.6.1

package.json

@@ -8,7 +8,7 @@
   "devDependencies": {
     "@primer/css": "^14.3.0",
     "prettier": "^2.0.5",
-    "stylelint": "^13.3.3",
+    "stylelint": "^13.6.1",
     "stylelint-config-prettier": "^8.0.2",
     "stylelint-config-primer": "^9.0.0",
     "stylelint-prettier": "^1.1.2",