update anchor to 0.28.1-beta.1 (pyth-network#73)

* update anchor to 0.28.1-beta.1

* update package lock

* update borsh

* update changelog

* 2.19.0

Merge pull request pyth-network#72 from pyth-network/guibescos/bump

Bump to 2.18.0

2.17.0

Merge pull request pyth-network#69 from pyth-network/add-xc-devnet

Add pythtest-crosschain

2.15.1

2.15.0

update PythConnection to subscribe to single accounts and add new ws …

…example with SOL/USDC feed (pyth-network#64)

Merge pull request pyth-network#63 from jacksturt/main

Export all items from cluster

bump package version (pyth-network#62)

* update changelog

* 2.13.0

2.12.0