Bump whois from 2.13.5 to 2.13.6

Bumps [whois](https://github.com/hjr265/node-whois) from 2.13.5 to 2.13.6.
- [Release notes](https://github.com/hjr265/node-whois/releases)
- [Commits](https://github.com/hjr265/node-whois/commits)

---
updated-dependencies:
- dependency-name: whois
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -18,6 +18,6 @@
     "pug": "^3.0.2",
     "stylus": "^0.54.7",
     "underscore": "^1.10.2",
-    "whois": "^2.13.5"
+    "whois": "^2.13.6"
   }
 }