[enzyme-adapter-react-13] v1.4.0
[enzyme-adapter-react-13] v1.4.0

 - [new] add `isCustomComponent` (#1960)
 - [dev deps] update `eslint`, `semver`, `rimraf`, `react-is`, `html-element-map`, `chai`, `eslint-plugin-mocha`
 - [build] include source maps

airbnb/enzyme,airbnb/enzyme