update stylelint & config-stylelint-wagtail (#7464)

Co-authored-by: LB Johnston <lb.johnston@virginaustralia.com>

package.json

@@ -60,7 +60,7 @@
     "@types/redux": "^3.6.0",
     "@typescript-eslint/eslint-plugin": "^4.5.0",
     "@typescript-eslint/parser": "^4.5.0",
-    "@wagtail/stylelint-config-wagtail": "^0.1.1",
+    "@wagtail/stylelint-config-wagtail": "^0.2",
     "autoprefixer": "^9.8.0",
     "babel-eslint": "^10.1.0",
     "babel-loader": "^8.2.2",
@@ -90,7 +90,7 @@
     "react-axe": "^3.1.0",
     "react-test-renderer": "^16.13.1",
     "redux-mock-store": "^1.3.0",
-    "stylelint": "^13.5.0",
+    "stylelint": "^13.13.1",
     "ts-jest": "^26.4.1",
     "ts-loader": "^9.1.1",
     "typescript": "^4.0.3",