fix: package.json to reduce vulnerabilities (#405)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-YARGSPARSER-560381

package.json

@@ -64,7 +64,7 @@
     "tap-spec": "~5.0.0",
     "tape": "~4.13.0",
     "webpack": "~4.42.0",
-    "webpack-cli": "~3.3.0"
+    "webpack-cli": "~3.3.5"
   },
   "description": "A fail-fast circuit breaker for promises and callbacks",
   "keywords": [