chore(package): update mocha to version 2.5.3
chore(package): update mocha to version 2.5.3

https://greenkeeper.io/
jaredpalmer/react-storybook-jsxstyle,jaredpalmer-archive/react-storybook-jsxstyle,jaredpalmer/react-storybook-jsxstyle,jaredpalmer-archive/react-storybook-jsxstyle