Major Update - handles upcoming changes to the Fast Lane smart contract

[Lesigh-3100]

Major changes:
This version of the bot checks the current version of the Fast Lane smart contract. The features in this update will be enabled as soon as the contract is upgraded to version 10. This version is meant to be a transition version, as upcoming changes to the Fast Lane smart contract will break current versions of the bot.

Improvements:

• Add support and handling for native & wrapped gas token wrapping/unwrapping.
• New Click Option - version_check_frequency. The bot will check the version of the Arb Contract with a frequency specified from this option. The default is 1, which has it check the version every loop.
• Add support for the Bancor POL auction for ETH > BNT. This includes an upgrade that allows pool balances to be fetched via Multicall.

Fixes:

• Fixed a calculation issue that could cause arbs with Carbon to fail when Carbon was the first trade.
• Fixed an issue in which Carbon curves where only one of the orders was disabled would fail. Now the bot will still use the curve that is not disabled.