feature: --package-json CLI argument

[jfirebaugh]

Support explicitly specified package.json in CLI.

I have a use case where I have the directory structure:

• root
  • package
    • tsconfig.json
    • package.json

And I want to run t2s from root, with arguments t2s --filename package/tsconfig.json --package-json package/package.json. I would rather be explicit about file paths than use --cwd.

[songkeys]

Thank you for this PR!

This adds a lot of complexity to the function arguments. I don't think this argument is necessary. You can use the cwd argument or read the package.json yourself and override the options using the swcOptions argument.

I'll keep this PR open to see if others find this useful as well. Perhaps in the next major version, I can simplify the function arguments to bring this in.

[jfirebaugh]

Fair enough, I will fork/vendor the code then.