- [fix] call ref for a root element (#1541)
 - [fix] Allow empty strings as key props
 - [refactor]: add “lifecycles” adapter option
 - [deps] remove unneeded `lodash` dep; update `prop-types`, `enzyme-adapter-utils`, `object.assign`
 - [dev deps] update `babel-cli`, `babel-core`, `babel-plugin-transform-replace-object-assign`, `babel-preset-airbnb`, `chai`, `coveralls`, `eslint`, `eslint-config-airbnb`, `eslint-plugin-import`, `eslint-plugin-jsx-a11y`, `eslint-plugin-react`, `lerna`, `json-loader`, `karma-firefox-launcher`, `prop-types`, `lerna`, `rimraf`, `webpack`