fix(package): update yargs to version 13.2.4 (#9)

Closes #4

Author: DoubleU23

package.json

@@ -47,6 +47,6 @@
     "chalk": "^2.4.1",
     "css": "2.2.4",
     "fetch": "^1.1.0",
-    "yargs": "^12.0.2"
+    "yargs": "^13.2.4"
   }
 }