datas prop type errors when passing values that aren't strings

[tgrgds]

Hiya!

In TypeScript, the CsvDownload component compiles and runs as intended when passing in an object such as the following:

type Thing = {
  id: number;
  name: string;
  birthday: Date;
};

const things: Thing[] = [
  {
    id: 12,
    name: "Bob",
    birthday: new Date(2000, 5, 14),
  },
  {
    id: 69420,
    name: "Tim",
    birthday: new Date(1998, 8, 23),
  },
];

However, I get the following type error in my IDE:

No overload matches this call.
  Overload 1 of 2, '(props: ICsvDownloadProps | Readonly<ICsvDownloadProps>): CsvDownload', gave the following error.
    Type 'Thing[]' is not assignable to type 'Datas | (() => Datas) | (() => Promise<Datas>) | Promise<Datas>'.
      Type 'Thing[]' is not assignable to type 'Datas'.
        Type 'Thing' is not assignable to type 'string[] | { [key: string]: string | null | undefined; }'.
          Type 'Thing' is not assignable to type '{ [key: string]: string | null | undefined; }'.
            Property 'id' is incompatible with index signature.
              Type 'number' is not assignable to type 'string'.
  Overload 2 of 2, '(props: ICsvDownloadProps, context: any): CsvDownload', gave the following error.
    Type 'Thing[]' is not assignable to type 'Datas | (() => Datas) | (() => Promise<Datas>) | Promise<Datas>'.ts(2769)

Because datas is expecting string | null | undefined, whereas it should allow anything that can be converted to a string (i.e. string | number | boolean | symbol | object | null | undefined).

Unless I'm missing something silly, I think it should be changed in this line to suit:

react-csv-downloader/src/lib/csv.ts

Line 8 in 319c8a0

export type Datas = (string[] | { [key: string]: string | null | undefined })[]