Pandas-market-calendars

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- Verified to work on pandas 2.2.0, max version changed in pyproject.toml
- Updated minimum version of Python to 3.9
- Corrected 2024 us sifma holidays & early closes 326
- Added national holiday for BMF calendar (Black Awareness Day, Nov 20th) 321
- Added BMF calendar holiday for New Year's Eve on Sunday 318
- BSE/NSE trading holidays 2024 updated 316

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- PR 310 to add EUREX Fixed Income calendars
- PR 311 to add good friday special closes for CME Globex

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- Reformat all code using Black and make black a standard PR 290
- Add XNSE as a name for BSE calendar
- Update holidays for BSE 277
- Update holidays for CN 305
- Add IEX to list of exchanges

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- Fixed broken build PR 292

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- Fixed for pandas 2.0 so all tests pass PR 282
- Move exchange_calendar*.py files to pandas_market_calendar/exchange_calendars/ PR 284
- Move holidays_*.py to pandas_market_calendar/holidays/ PR 284
- Major cleanup including unused imports PR 284

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- Fix the pyproject.toml to properly generate sdist PR 267
- Remove .travis.yml file as Travis-CI is no longer used
- Merge .coveragerc into pyproject.toml