Features
- Added DNS lookup using Google DNS, refactored IP code (#246) @bee-san
- Take file of addresses as input (#237) @bee-san
Maintenance
- Refactored tests, introduced default function in test context for structs (#235) @bergabman
- Increase code coverage (#236) @bee-san
- Update Dockerfile to encourage layer caching (#241) @CMNatic
- docs: add dmitris as a contributor (#232) @allcontributors
- Bump structopt from 0.3.17 to 0.3.18 (#243) @dependabot-preview