use ApiChange ctor

[codecov[bot]]

Codecov Report

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

Project coverage is 85.89%. Comparing base (2ab458f) to head (c519e1f).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #576 +/- ## ======================================= Coverage 85.88% 85.89% ======================================= Files 228 228 Lines 12968 12974 +6 ======================================= + Hits 11138 11144 +6 Misses 1415 1415 Partials 415 415 ``` | [Flag](https://app.codecov.io/gh/Tufin/oasdiff/pull/576/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Tufin) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/Tufin/oasdiff/pull/576/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Tufin) | `85.89% <100.00%> (+<0.01%)` | :arrow_up: | 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=Tufin#carryforward-flags-in-the-pull-request-comment) to find out more.

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