fix(linter/test-consistency): display lowest version_added for arrays

[queengooborg]

Kind of a follow-up to #5833. While working on some additional versions, I realized that when a subfeature has an earlier version than its parent, the linter prints the parent version as well. However, we'd have it print "[Array]" when the parent feature has an array for support. I realize that simply printing "[Array]" is not as helpful.

The consistency linter already has a function that gets the earliest version_added from an array (or just the version_added of a single support statement), so I figured that we should hook it up to the output, removing the need to print "[Array]" at all.

This PR hooks up all output of parent values with the getVersionAdded function, so that the earliest version_added in an array is printed, rather than "[Array]".

[ddbeck]

I don't know when this will get a proper review, but something that might help when we actually get to it: a set of before-and-after examples. I'm not completely clear on what this fixes, how it's supposed to fix it, and whether it actually does that fix. I think some examples would go a long way here.

[queengooborg]

Sure thing! An example would be the following. In the linter's current state, the output is the following:

✖ api/MediaStream.json
  Consistency - 1 error:
  → 1 × MediaStream [api.MediaStream]: 
    → Basic support in chrome was declared implemented in a later version (undefined) than the following sub-feature(s):
      → api.MediaStream.MediaStream: [Array]

With this PR, the output would be the following:

✖ api/MediaStream.json
  Consistency - 1 error:
  → 1 × MediaStream [api.MediaStream]: 
    → Basic support in chrome was declared implemented in a later version (21) than the following sub-feature(s):
      → api.MediaStream.MediaStream: 19

[foolip]

It seems like this doesn't just change what gets displayed, but also changes what the lint is, right? Does it make the lint more strict, more lax, or just different?

[queengooborg]

Nope, actually this only changes the display for the tests, as surprising as that may seem considering all the changes!