updating tests for downcase and lowercase

[jaredwray]

Please check if the PR fulfills these requirements

• [x] Followed the Contributing guidelines.
• [x] Tests for the changes have been added (for bug fixes/features) without decreasing code coverage.
• [x] Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...) updating tests for downcase and lowercase

[codecov[bot]]

Codecov Report

Patch coverage has no change and project coverage change: +0.06% :tada:

Comparison is base (51bb323) 96.58% compared to head (161ed8f) 96.65%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #13 +/- ## ========================================== + Coverage 96.58% 96.65% +0.06% ========================================== Files 26 26 Lines 4425 4425 ========================================== + Hits 4274 4277 +3 + Misses 151 148 -3 ``` [see 1 file with indirect coverage changes](https://app.codecov.io/gh/jaredwray/fumanchu/pull/13/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Jared+Wray)

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