Switch CI from macOS 13 to macOS 15 runners

[Copilot]

Switches the GitHub Actions CI workflow from the deprecated macos-13 runners to macos-15-intel runners for macOS x86_64 builds.

Changes Made

• Updated .github/workflows/publish.yml to use macos-15-intel instead of macos-13 for macOS x86_64 wheel builds
• Updated documentation comment in the workflow file to reflect the new runner
• Updated README.md support matrix to show macOS 15+ requirement for x86-64 PyPI wheels
• Added breaking change entry to CHANGELOG.md documenting the macOS 15 requirement

This change addresses the deprecation of macOS 13 runners as outlined in actions/runner-images#13046.

Note: This is a breaking change for users on macOS x86_64 systems older than macOS 15, as PyPI binary wheels will no longer be compatible with macOS 13 or 14.

• Fixes CI: switch from macOS 13 runners #587

Original prompt

---

This section details on the original issue you should resolve

<issue_title>CI: switch from macOS 13 runners</issue_title>
<issue_description>Context

actions/runner-images#13046</issue_description>

<agent_instructions>Switch from macos-13 to macos-15-intel for macos x86_64 CI builds</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes CI: switch from macOS 13 runners #587

---

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[hombit]

@copilot try again

[Copilot]

@copilot try again

Switched from macos-13 to macos-15-intel for macOS x86_64 CI builds in publish.yml (70b5c2a)

[hombit]

@copilot please update information about OS support in the readme and update the changelog with a breaking change

[Copilot]

@copilot please update information about OS support in the readme and update the changelog with a breaking change

Updated README support matrix to show macOS 15+ requirement and added breaking change entry to CHANGELOG (178db2f)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.60%. Comparing base (c5ba089) to head (178db2f).
⚠️ Report is 7 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #588   +/-   ##
=======================================
  Coverage   82.60%   82.60%           
=======================================
  Files           9        9           
  Lines        2604     2604           
=======================================
  Hits         2151     2151           
  Misses        453      453           

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[codspeed-hq]

CodSpeed Performance Report

Merging #588 will degrade performances by 10.2%

_{Comparing copilot/switch-to-macos-15-runners (178db2f) with master (c5ba089)¹}

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

Summary

❌ 1 regression
✅ 105 untouched
⏩ 106 skipped²

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Mode	Benchmark	BASE	HEAD	Change
❌	WallTime	test_benchmark_naive	20.1 µs	22.4 µs	-10.2%

Footnotes

1. No successful run was found on master (178db2f) during the generation of this report, so c5ba089 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

2. 106 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩