Feature Request: Make parsing failures more verbose

[lmosele]

react-scanner/src/scan.js

Line 109 in 92b2d88

console.error(`Failed to parse: ${filePath}`);

I'm currently operating within a React/Flow codebase and am finding that everything is awesome aside from a miscelleanous series of components fail to be parsed entirely. It's not clear as to why since the error itself isnt surfaced, but I suspect it either trips up on the flow types of any extra exports within the file?

If possible I'd love to see a few more config options that specify pre-parsing rules (ie maybe a regex exclude?). Not entirely sure what the best move would be, but open to helping out if necessary!

[moroshko]

Flow is not supported at the moment (we only have TypeScript support).
PR is welcome!