flow-remove-types/register is not acting according to flowconfig

[niklas-e]

I was having issues with running my tests, because I didn't realise this is not acknowledging flowconfig file. In my flowconfig I have all=true, but to get flow-remove-types/register work in the same way, I have to pass {all: true} to the module.

[motiz88]

This would certainly be handy, but I don't see it happening soon - We probably don't want to duplicate Flow's .flowconfig lookup and parsing logic here. If at some point we split that code out of Flow in a form we can publish to npm (like we do for flow-parser) then this would become feasible.