build: update css dependency to latest version (#270)

Author: kboedges

package.json

@@ -35,7 +35,7 @@
     "@types/testing-library__jest-dom": "^5.9.1",
     "aria-query": "^4.2.2",
     "chalk": "^3.0.0",
-    "css": "^2.2.4",
+    "css": "^3.0.0",
     "css.escape": "^1.5.1",
     "jest-diff": "^25.1.0",
     "jest-matcher-utils": "^25.1.0",