Extend `_ThaiLunisolar` calendar support to 2157

PPsyrius commented 1 month ago

Proposed change

This PR extends the _ThaiLunisolar calendar used by Cambodia, Laos, and Thailand for their holidays calculation to 2157 (2700 B.E. in Thai Traditional Calendar, 2701 B.E. in Lao and Khmer Traditional Calendar), up from the previous 2057 end date implementation.

This has been cross-checked with the data listed on https://www.myhora.com/ปฏิทิน/ .

Type of change

[ ] New country/market holidays support (thank you!)
[ ] Supported country/market holidays update (calendar discrepancy fix, localization)
[x] Existing code/documentation/test/process quality improvement (best practice, cleanup, refactoring, optimization)
[ ] Dependency update (version deprecation/pin/upgrade)
[ ] Bugfix (non-breaking change which fixes an issue)
[ ] Breaking change (a code change causing existing functionality to break)
[ ] New feature (new python-holidays functionality in general)

Checklist

[x] I've followed the contributing guidelines
[x] I've run make pre-commit, it didn't generate any changes
[x] I've run make test, all tests passed locally

codecov[bot] commented 1 month ago

Codecov Report

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

Project coverage is 100.00%. Comparing base (c225ae5) to head (6e8149e). Report is 1 commits behind head on dev.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #1981 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 188 188 Lines 11407 11407 Branches 1790 1790 ========================================= Hits 11407 11407 ```

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