Preliminary Typed Version

[DaveyJake]

Please let me know if this will work to make yadcf compatible with Typescript.

https://gist.github.com/DaveyJake/a7009c82ed3f4fbd278b814d62009631

[DaveyJake]

Running tsc yields no errors. Let me know if this works. The transpiled version can be found in the src/ts directory.