47 make single public function for havengetallen

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 22.58065% with 24 lines in your changes missing coverage. Please review.

Project coverage is 18.07%. Comparing base (7723cf8) to head (5098dbf).

Files	Patch %	Lines
kenmerkendewaarden/havengetallen.py	23.52%	13 Missing :warning:
kenmerkendewaarden/gemiddeldgetij.py	21.42%	11 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #48 +/- ## ========================================== + Coverage 17.97% 18.07% +0.09% ========================================== Files 8 8 Lines 890 902 +12 ========================================== + Hits 160 163 +3 - Misses 730 739 +9 ```

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[sonarcloud[bot]]

Quality Gate passed

Issues
11 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud