Remove 'crypto' which is now in Node core
Remove unused dependencies
Unpin version range on '@pubsweet/ui'
Remove all direct dependencies on 'react', 'react-dom' and 'redux'
Remove peerDependencies on packages which are not directly required
Change all peerDependency ranges to >= instead of ^ since we don't know that the package will not be compatible with the next semver major version
Remove 'babel-preset-es2015'