V3Utils

Utilities for Uniswap-v3 protocol. This is a fork of https://github.com/revert-finance/v3utils, I had remove the API calls to 0x for swapping and implementing the swap through the SwapRouter of Uniswap v3. In addition, I also made the other two modules, AutoExit and AutoRange, compatible with the solc compiler 0.8.0.