Internal renames to avoid conflicts with `core::hash`

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 90.23%. Comparing base (2537311) to head (da0e4c7).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #122 +/- ## ========================================== + Coverage 90.21% 90.23% +0.01% ========================================== Files 46 46 Lines 8186 8190 +4 ========================================== + Hits 7385 7390 +5 + Misses 801 800 -1 ```

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