Cementing the last release

• chore: remove tslint in favor of eslint 44162fd
• ci: cache modules using checksum of package-lock.json file 6848d0b
• chore: remove package-lock.json from .gitignore file 9fdc95f
• refactor: rename authenticator to guards b363890
• refactor: remove authenticatable from config ef79804
• chore: rename contracts.txt to contract.txt 58f7534
• refactor: renaming authenticatable to provideruser and driver to authenticator 6f154e2

v4.0.0...v4.0.1