Pythclient

What's Changed
* fix fx/metal get_next_market_close by cctdaniel in https://github.com/pyth-network/pyth-client-py/pull/44


**Full Changelog**: https://github.com/pyth-network/pyth-client-py/compare/v0.1.16...v0.1.17

What's Changed
* add rates calendar by cctdaniel in https://github.com/pyth-network/pyth-client-py/pull/43


**Full Changelog**: https://github.com/pyth-network/pyth-client-py/compare/v0.1.15...v0.1.16

What's Changed
* Compress by vaa payload by ali-bahjati in https://github.com/pyth-network/pyth-client-py/pull/42


**Full Changelog**: https://github.com/pyth-network/pyth-client-py/compare/v0.1.14...v0.1.15

What's Changed
* refactor is_accumulator_update by cctdaniel in https://github.com/pyth-network/pyth-client-py/pull/41


**Full Changelog**: https://github.com/pyth-network/pyth-client-py/compare/v0.1.13...v0.1.14

What's Changed
* add function to combine accumulator update by cctdaniel in https://github.com/pyth-network/pyth-client-py/pull/40


**Full Changelog**: https://github.com/pyth-network/pyth-client-py/compare/v0.1.12...v0.1.13

What's Changed
* fix next_market_open for fx and metal by cctdaniel in https://github.com/pyth-network/pyth-client-py/pull/39


**Full Changelog**: https://github.com/pyth-network/pyth-client-py/compare/v0.1.11...v0.1.12