v3.0.0

• Breaking: Deps updates: babel-eslint to 5.x.x and eslint-config-airbnb to 6.x.x.
• Breaking: Eslint rule: no-return-assign: [2, "always"] (http://eslint.org/docs/rules/no-return-assign.html)
• Breaking: Eslint rule: no-param-reassign: [2, { "props": false }] (http://eslint.org/docs/rules/no-param-reassign.html)