Support ts(x) file parsing using CLI

[Kureev]

Why

The current implementation of react-docgen CLI doesn't support passing a single *.ts(x) file for parsing. As you can see from the source code, internal function parse is called with only one parameter (content of the required file), however, in order to specify that the file should be parsed according to the TypeScript spec, we need pass options to the babelParser that should contain a filename with ts(x) extension. If we don't pass filePath (see my patch), options object will become empty and flow parser will be used instead (which is incompatible with some TypeScript features).

Scope of the bug

This bug only affects react-codegen CLI tool

Solution

Pass filePath along with the file content

[danez]

Good catch, thanks for that.