Commits on Aug 23, 2019
* allow passing a callback to useFetch's `run` to modify init * useFetch: allow passing an object to `run` to be spread over `init` * better typings for `run`, add example * Upgrade storybook. * run() now returns void. Fixed code style. * Improve readability of parseResponse function. * Improve readability of isDefer. * Avoid nested ternaries. * Code style. * Extend docs on 'run'.