* Update @storybook/addon-actions to version 3.1.8

* Update @storybook/react to version 3.1.8

* Update autoprefixer to version 7.1.2

* Update babel-loader to version 7.1.1

* Update babel-preset-env to version 1.6.0

* Update chai to version 4.1.0

* Update js-yaml to version 3.9.0

* Update jsdom to version 11.1.0

* Update postcss-smart-import to version 0.7.5

* Update sinon to version 2.3.7

* Update substring-trie to version 1.0.1

* Update webpack to version 3.2.0

* Update webpack-manifest-plugin to version 1.1.2

* yarn upgrade

* Upgrade extract-text-webpack-plugin to version 3.0.0

* Upgrade intl-relativeformat to version 2.0.0