Improve lint:links - exclude support images/links

[simon04]

• Ignore failures on sponsor/backer images/links
• Do not allow any other failure to not miss broken links such as Fix link in api/plugins/compiler.md #1188 or docs(README): absolute link to example webpack-contrib/less-loader#194

[skipjack]

This is great, unfortunately we still have to figure out this FATAL ERROR: ... thing happening in the hyperlink package. I may test the suggestion here if that works as a temporary solution. @Munter maybe we should create an issue for this over at the hyperlink package to track a more stable fix?

[Munter]

@skipjack Yeah, it's definitely hyperlinks fault

[skipjack]

@Munter thanks for being so responsive and helpful with this package... just created Munter/hyperlink#117 so we can track this.

[skipjack]

@simon04 if you tested your change on this PR locally and npm run lint:links worked ok I'm good with this being merged. We can resolve that hyperlink error on a separate PR.

[simon04]

Currently the check correctly fails due to one broken link. Maybe we should wait for webpack-contrib/less-loader#194 to be merged?

[skipjack]

@simon04 yea I'm good with that, I'll leave this to you then.

[simon04]

Since the other PR is merged, I'll merge this one as well. 😄