Add typings.d.ts for use with TypeScript

[kykint]

Please, add typings.d.ts for use with TypeScript

[Dominic-Preap]

@natergj and @kykint checkout my repo. I end up customize my own definition. Everything is related to the doc except addConditionalFormattingRule() and addImage() which I am not implement yet.

maybe you guys can help implement and publish it.

[natergj]

Thanks, @Dominic-Preap
I've got a branch going right now for version 2 of excel4node. That version is being written in TypeScript and will have types build automatically for it. In the meantime, maybe you could submit your typings file for version 1 to the https://github.com/DefinitelyTyped/DefinitelyTyped repo for other v1 users

[Dominic-Preap]

@natergj please do it for me cause I am not familiar with publish to npm. It would benefit to everyone. Thank you.

[RyanSMurphyDMCo]

@natergj How is that second branch coming along for typescript?

[bobweil]

For my copy, I added the middle line in the snippet below to cover writing to the Express Response:
write(filename: string): void;
write(filename: string, res: Response): void; // Added this.
write(filename: string, callback: (err: any, stats: Stats) => void): void;