This change reverts the solidity version to 0.8.4 as the current version
troubles the Pyth price feeds contract deployment. Some tests are
changed to use the methods available in the older version.
Also, the Pyth contract version is updated. This is because we made a
change to the Governance structs (to add Stacks) that results in a new
bytecode.
* feat(ethereum): charge update fee per numUpdates for accumulator updates
* refactor(ethereum): refactor, add benchmarks for getUpdateFee
* refactor(ethereum): add back parseWormholeMerkleHeaderNumUpdates
* refactor: increment totalNumUdpates by 1 for batch prices
* test(ethereum): add test for checking getUpdateFee for accumulator, clean up unused code
Ali Behjati
Jayant Krishnamurthy
Amin Moghaddam
swimricky