Unit test for CLI flag --name + doc update

[kamolins]

Addresses: #1309

• Added unit test to ensure that CLi flag --name supports regex
• Updated docs

[davidjgoss]

Thanks for doing this @kamolins, looks good.

Would you be able to add a test that fails without your change and passes with it?

[kamolins]

@davidjgoss Done!

[davidjgoss]

@kamolins sorry, looking again at the documentation, this argument is listed as supporting regular expressions, so moving away from match will break that which I don't think we want to do (paging @charlierudolph in case I'm wrong).

You should be able to escape the parentheses and other characters that have regex meaning with backslashes, I think?

I do still think there is worthwhile change to make here if you wanted to pivot this PR a bit:

• The doc briefly mention regex, but it might be worth showing an example with escaping
• No tests broke when you changed from match to includes - we should add one that proves the regex support

[kamolins]

@davidjgoss You make a good point! includes won't match a regex, afaik. I should have read the docs more carefully. I will update the PR.

[kamolins]

@davidjgoss Updated the PR. Lmk if I should do anything else.

By the way, my previous push was marked as failed here on node v10 with an unrelated issue. Not really sure what went wrong there.

[aslakhellesoy]

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