434c657

Updated README.
Updated all dependencies in package.json.
Updated all scripts in package.json.
Replaced ethlint with solhint.
Added additional rules for Solidity code.
Removed all legacy code - some legacy code remains for the Swaps unit test.
Any remaining legacy code for unit tests is buried under contracts/utils/mocks/legacy.
contracts/roles -> contracts/utils/roles.
Also removed some unused contract files in here.
contracts/tools -> contracts/utils.
contracts/helpers -> contracts/utils.
Swaps moved to contracts/utils/swaps.
contracts/erc1820 -> contracts/utils/erc1820.
All “base” contracts (contracts that should be inherited) are now marked as abstract contract so they cannot be deployed.
ERC20Extendable -> ERC20.
ExtendableHooks -> TokenEventManager.
Also moved from contracts/tokens/extension -> contracts/tokens/eventmanager.
Storage of event listeners moved to TokenEventManagerStorage.
Also moved to contracts/token/storage.
ExtendableProxy merged with ExtendableTokenProxy.
ExtendableBase -> RegisteredExtensionStorage.
Also moved to contracts/token/storage.
Merged bug fixes from feat/diamond to develop.
Add contract name when invoking internal child contract functions.
Removed unused migrations.
Removed unused tests.