DOMelementMaxDepth: add offenders

Porting https://github.com/gmetais/YellowLabTools/commit/714d35aa27ce43e294d9db00fbbc985a867150f3
DOMelementMaxDepth: now with offenders
Merge pull request #430 from macbre/dom-element-max-depth-offenders

Report offenders for DOMelementMaxDepth