Address warnings when compiling project with C++23

[codecov[bot]]

Codecov Report

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

Project coverage is 77.53%. Comparing base (f98dc1b) to head (ef01264).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #310 +/- ## ========================================== - Coverage 77.55% 77.53% -0.03% ========================================== Files 173 173 Lines 21225 21225 Branches 2310 2310 ========================================== - Hits 16462 16457 -5 - Misses 3756 3758 +2 - Partials 1007 1010 +3 ``` | [Flag](https://app.codecov.io/gh/paulsengroup/hictk/pull/310/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=paulsengroup) | Coverage Δ | | |---|---|---| | [tests | integration](https://app.codecov.io/gh/paulsengroup/hictk/pull/310/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=paulsengroup) | `67.95% <ø> (-0.05%)` | :arrow_down: | | [tests | unittests](https://app.codecov.io/gh/paulsengroup/hictk/pull/310/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=paulsengroup) | `75.85% <ø> (-0.03%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=paulsengroup#carryforward-flags-in-the-pull-request-comment) to find out more.

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