fix(package): update yargs to version 13.3.0

Closes #24

Author: greenkeeper[bot]

package.json

@@ -44,7 +44,7 @@
     "columnify": "^1.5.4",
     "pretty-bytes": "^5.1.0",
     "puppeteer": "^1.6.0",
-    "yargs": "^12.0.1"
+    "yargs": "^13.3.0"
   },
   "devDependencies": {
     "@scurker/eslint-config": "^1.1.2",