Ignore Danger run on WIP pull request

[byhbt]

We should ignore the Danger run on WIP pull requests to avoid some noise to the developer at the time that the PR is not ready for review.

Example:

# Make it more obvious that a PR is a work in progress and shouldn't be merged yet.
has_wip_label = github.pr_labels.any? { |label| label.include? "WIP" }
has_wip_title = github.pr_title.include? "[WIP]"

if has_wip_label || has_wip_title
  message("Skipping Danger since PR is classed as Work in Progress")
  return
end

The code should handle: [WIP], WIP, label WIP, PR status Draft