fix(package): update uikit to version 3.1.9

Closes #100

Author: greenkeeper[bot]

package.json

@@ -26,7 +26,7 @@
     "sass-lint": "1.13.1"
   },
   "dependencies": {
-    "uikit": "3.0.1"
+    "uikit": "3.1.9"
   },
   "browserslist": [
     "> 0.5%",