Market-prices

What's Changed

Maintenance
* Add advices to error messages when Yahoo API unavailable (229) maread99
* Update dependencies (221) maread99

What's Changed

**Loads**

> [!IMPORTANT]
> **Minimum supported Python version is now 3.9**
>
> **`market-prices` no longer uses the third-party `pytz` library.** From `market_prices` 0.11 time zones are represented by instances of `ZoneInfo` (see standard library [`zoneinfo`](https://docs.python.org/3/library/zoneinfo.html)).
>
> Thank you `pytz` for all you did for as long as you did it!

Maintenance
* Advance python minimum version to 3.9 (204) maread99
* Migrate from `pytz` to `zoneinfo` (204) maread99
* Update dependencies including changes required to support pandas 2.1.0 (204) maread99

Under-the-bonnet
* Drops `pydantic` in favor of in-house [`valimp`](https://github.com/maread99/valimp) package for validation/parsing of inputs to public functions (#204) maread99

New Features
* Yahoo delay mappings added for Seoul and Shenzhen exchanges (204) maread99

What's Changed

Maintenance

* Patch for pydantic v2 (176) maread99
* Update dependencies (176) maread99

What's Changed

Bug Fixes

* Fix bug following yahoo API change to 'quotes' endpoint (155 and 166) maread99

Maintenance

* Update dependencies (166) maread99

Testing

* Update `test_yahoo` for pandas PerformanceWarning (154) maread99

What's Changed

Bug Fixes
* Revisions to support pandas 2.0 (152) maread99

Documentation
* Update readme (145) maread99

Maintenance
* Update dependencies including pandas to 2.0 (152) maread99

What's Changed

Bug Fixes

* Fix downsampling assertion check (144) maread99

Maintenance

* Update formatting to black 23.1 (144) maread99
* Update dependencies (144) maread99