Flow shows lots of errors related to react-navigation

[brettdh]

Note: Waiting on fixing this for now, pending a response to my comment here on a PR that removed flow from react-navigation.

Expected behavior

Flow reports no errors.

Actual behavior

Flow reports 141 errors, the first 50 of which are displayed. They all seem to be related to react-navigation. (It may seem surprising that flow is checking anything in node_modules/**, but it would seem that it checks things that we import.

Steps to reproduce the problem

1. yarn flow

Environment

• App version (or commit SHA): 3419418fc9ea4f1639dc094be9fb505f32d3bccd
• Dev environment:

➜ node --version
v8.8.1
➜ yarn --version 
1.1.0
➜ yarn flow version  
yarn run v1.1.0
$ flow "version"
Flow, a static type checker for JavaScript, version 0.53.0
✨  Done in 0.18s.
➜ grep -A3 version .flowconfig
[version]
^0.53.0