best-practices

Provide the steps to reproduce

1. Run LH on https://output.jsbin.com/vulerujohi for just

Describe the solution you'd like

Validate test commands arguments before Run. This pattern will allow us to governance behaviors such as flags/arguments validation in all commands. Additionally, this should make the code easier to understand and maintain.

Requirements
Golang basic level.

“How to Implement” suggestion

See [issue](datreeio/datree#4

What and where?
Please give the broken URL. Where is the link located?

Would you like to be assigned to this issue?
Check the box if you will submit a PR to fix this issue. Please read CONTRIBUTING.md.
-KONG [ ] Assign me, please!

This hint has been around since 2018 and is documented on webhint.io (https://webhint.io/docs/user-guide/hints/hint-doctype/). However it's not enabled by default in any of webhint's configurations (likely an oversight).

We should turn this on by default and perform any necessary cleanup in the process (e.g. switching to get locations from webhint's location-aware DOM that was added after the