Watch an object or array for changes
https://github.com/sindresorhus/on-change/compare/v2.2.0...v2.2.1
https://github.com/sindresorhus/on-change/compare/v2.1.4...v2.2.0
https://github.com/sindresorhus/on-change/compare/v2.1.3...v2.1.4
https://github.com/sindresorhus/on-change/compare/v2.1.2...v2.1.3
https://github.com/sindresorhus/on-change/compare/v2.1.1...v2.1.2
https://github.com/sindresorhus/on-change/compare/v2.1.0...v2.1.1
https://github.com/sindresorhus/on-change/compare/v2.0.2...v2.1.0
https://github.com/sindresorhus/on-change/compare/v2.0.1...v2.0.2
https://github.com/sindresorhus/on-change/compare/v2.0.0...v2.0.1
https://github.com/sindresorhus/on-change/compare/v1.8.1...v2.0.0