Neon EVM implementation requires more transaction accounts

[jstarry]

Problem

The Neon EVM requires more transaction accounts than the current limit of 64 accounts per transaction. This is because many smart contracts require 100 - 120 accounts.

Proposed Solution

The current transaction account lock limit of 64 accounts was added to prevent transactions from using up to 256 accounts in a single transaction until transaction cost model changes are made to reflect the runtime overhead of processing transactions with additional accounts.

• Bump the transaction account limit to 128 accounts.