chore(deps-dev): bump stylelint from 14.16.1 to 16.18.0

.stylelintignore

@@ -1,3 +1,5 @@
-build/
+node_modules/
 source/_patterns/**
 .stylelintrc.json
+source/styleguide/css/styleguide-specific.min.css
+source/css/pattern-scaffolding.css

.stylelintrc.json

@@ -1,8 +1,5 @@
 {
-	"extends": [
-		"stylelint-config-sass-guidelines",
-		"stylelint-config-prettier"
-	],
+	"extends": ["stylelint-config-standard-scss"],
 	"rules": {
 		"selector-no-qualifying-type": null,
 		"selector-class-pattern": null,
@@ -14,6 +11,6 @@
 		"declaration-property-value-disallowed-list": null,
 		"scss/percent-placeholder-pattern": null,
 		"scss/at-mixin-pattern": null,
-		"order/properties-alphabetical-order": null
+		"declaration-property-value-no-unknown": true
 	}
 }