Add cognitive complexity as well

[selfrefactor]

So I would ask to also add the sonarqube cognitive complexity metric which deviates from cyclomatic complexity

Moved from selfrefactor/rambda#718

[selfrefactor]

so you mean to add this library https://www.npmjs.com/package/sonarqube-scanner ?

I think that it could be also possible to use https://github.com/SonarSource/eslint-plugin-sonarjs and I will give it a try.

Also, I'd like some feedback do you like that complexity below 12 are displayed as square with inner square?