fix(package): update yargs to version 11.0.0

Author: greenkeeper[bot]

package.json

@@ -57,6 +57,6 @@
   "dependencies": {
     "flat": "^4.0.0",
     "lodash": "^4.17.4",
-    "yargs": "^10.0.3"
+    "yargs": "^11.0.0"
   }
 }