including content from node_modules is impossible without a nonintuitive exclude

[sbma44]

The test mock framework I'm working on needs to use flow-remove-types to include some components of a project in its node_modules. From the docs it seems like I should be able to accomplish this with:

require('flow-remove-types/register')({ includes: /.*?\/mapbox-gl\/src\/.*/ });

But this doesn't work because of the logic in https://github.com/flowtype/flow-remove-types/blob/769385af04e8151579701d3c3a1d450a2db3b021/register.js#L49 -- the default exclusion value breaks my inclusion criterion. Instead I have to do something like:

require('flow-remove-types/register')({ includes: /.*?\/mapbox-gl\/src\/.*/, excludes: { test: function() { return false; }} });

This is workable but unintuitive. I'd like to suggest dividing the logic into more levels of priority:

explicit exclusion criteria > explicit inclusion criteria > default exclusion criteria > default inclusion criteria

[motiz88]

I wonder if this would be solved by migrating to pirates (#62).