Pythclient

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

What's Changed
* support accumulator update data by cctdaniel in https://github.com/pyth-network/pyth-client-py/pull/38


**Full Changelog**: https://github.com/pyth-network/pyth-client-py/compare/v0.1.10...v0.1.11

What's Changed
* add functions to parse vaa to price info by cctdaniel in https://github.com/pyth-network/pyth-client-py/pull/37


**Full Changelog**: https://github.com/pyth-network/pyth-client-py/compare/v0.1.9...v0.1.10

What's Changed
* return market hours in timestamp instead of iso string by cctdaniel in https://github.com/pyth-network/pyth-client-py/pull/36


**Full Changelog**: https://github.com/pyth-network/pyth-client-py/compare/v0.1.8...v0.1.9

What's Changed
* refactor by cctdaniel in https://github.com/pyth-network/pyth-client-py/pull/34


**Full Changelog**: https://github.com/pyth-network/pyth-client-py/compare/v0.1.7...v0.1.8