Small refactor on Cache Builder catch-all

[renatomassaro]

This PR fixes #235, or, actually, invalidates it.

Once we define one or more else conditions within with, dialyzer won't be happy if we leave unmatched patterns.

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This change is 

[sourcelevel-bot[bot]]

Ebert has finished reviewing this Pull Request and has found:

• 9 possible new issues (including those that may have been commented here).
• 3 fixed issues! 🎉

But beware that this branch is 11 commits behind the HackerExperience:master branch, and a review of an up to date branch would produce more accurate results.

You can see more details about this review at https://ebertapp.io/github/HackerExperience/Helix/pulls/241.

[umamaistempo]

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Reviewed 85 of 85 files at r1. Review status: all files reviewed at latest revision, all discussions resolved.

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