fix(package): update known-css-properties to version 0.13.0

Closes #109

Author: greenkeeper[bot]

package.json

@@ -8,7 +8,7 @@
   },
   "dependencies": {
     "autoprefixer": "^9.4.3",
-    "known-css-properties": "^0.11.0",
+    "known-css-properties": "^0.13.0",
     "normalize-range": "^0.1.2",
     "postcss-selector-parser": "^5.0.0",
     "postcss-value-parser": "^3.3.1",