Resolve "Fix security vulns in npm dependencies"
Closes #297 (closed)
Upgraded react-scripts to 1.1.5 and "freezed" redoc version to last known working version.
Heads up: create-react-app version 2 is just released. Next upgrade will be to version 2. It is major version upgrade with possible breaking changes. Further investigation is needed before next upgrade of directory-ui could be performed.