fix(package): update yargs to version 9.0.1 (#326)

Author: greenkeeper[bot]

package.json

@@ -74,7 +74,7 @@
     "jest-util": "^21.0.0",
     "pkg-dir": "^2.0.0",
     "source-map-support": "^0.4.4",
-    "yargs": "^8.0.1"
+    "yargs": "^9.0.1"
   },
   "peerDependencies": {
     "jest": "^21.0.0 || ^21.1.0-alpha.1 || ^22.0.0-alpha.1",