Update Hong Kong holidays

[KJhellico]

Proposed change

Update Hong Kong holidays (massive rewrite, actually).

Type of change

• [ ] New country/market holidays support (thank you!)
• [x] Supported country/market holidays update (calendar discrepancy fix, localization)
• [ ] Existing code/documentation/test/process quality improvement (best practice, cleanup, refactoring, optimization)
• [ ] Dependency update (version deprecation/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

[coveralls]

Pull Request Test Coverage Report for Build 9082675051

Details

• 164 of 164 (100.0%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 9025569154:	0.0%
Covered Lines:	11164
Relevant Lines:	11164

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💛 - Coveralls

[PPsyrius]

@KJhellico I don't think this is the intended behaviour here:

[KJhellico]

1. Yes, now snapshot looks incorrect in the part of displaying observed holidays. I'm working on it.
2. According to Wiki

1983年起，英女皇壽辰假期由4月21日改為英國官方慶祝日6月第二個星期六，而之後的星期一亦放假。

I translated it as

Since 1983, the Queen's birthday holiday has been changed from April 21 to the second Saturday in June, the official British celebration day, and the following Monday is also a holiday.

That's why Queen's Birthday holiday looks like this. If I'm wrong, please correct me.

[KJhellico]

Now, with #1769 merged, snapshot looks more realistic.

[sonarcloud[bot]]

Quality Gate passed

Issues
3 New issues
0 Accepted issues

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

See analysis details on SonarCloud