We (i.e. the jitsi-meet project) are using the haste module system on
Web as well, not only on React Native. Unfortunately, Flow does not
support .web.js by default. Override Flow's defaults to include .web.js
as well. Technically, we have .native.js as well so the choice of
.web.js may lead to errors. Practically though, it is a potential future
problem that we do not have at the time of this writing.

https://github.com/jitsi/jitsi-meet/pull/1397 will take advantage of the
wider Flow use. The PR in question is huge at the time of this writing.
In order to reduce it, I'm extracting changes not directly related to
React-ifying the Toolbar.

@atlaskit components will all require styled-components in the
future. Including it now will remove the unmet peer
dependency warning during npm install and prevent future build
breakages that might occur from using a new @atlaskit component
that requires it.

Pull Request #1449

The first step towards enabling Facbook's flow in the project. The flow
configuration is pristine as generated by react-native upgrade.