Compare npm package versions and show what changed between them.
The registry diff
npm-diff$ npm-diff pkg@1.0.0 pkg@2.0.0$ npm-diff pkg@1.0.0$ npm-diff package-a@1.2.3 package-b@1.2.3$ npm-diff lodash@4.17.20 lodash@4.17.21$ npm-diff . pkg@1.0.0