Support for typescript definitions

[GaikwadPratik]

Why don't you add typescript definitions in the package? I mean there is one created https://www.npmjs.com/package/@types/xmlbuilder by @wallymathieu. But those are not updated for quiet a long time. It would be easier to maintain them in the project.

[oozcitak]

Will do. Thanks. 🥂

[GaikwadPratik]

If you are okay, without any objections from @wallymathieu, I can import existing ones for quick resolution in a PR. I am sort of blocked because of them. As is I have created a PR DefinitelyTyped/DefinitelyTyped#34084 for 782540c. Would be easier for any new consumer to get going.

[wallymathieu]

Are there named parameters in typescript nowadays?

[oozcitak]

@GaikwadPratik a PR from existing definitions would be much appreciated if @wallymathieu agrees. I can then just package the types with the library.

[wallymathieu]

I think it makes more sense to have the types in the package. If you could look at the PR to tell me if it's ok? I'm away from computers for a few days so won't be able to verify the PR.

[oozcitak]

XMLCreateOptions looks good in the PR.

We need to add an options argument to XMLWriter because of b6c2503:

interface XMLWriter {
    [x: string]: ((e: XMLElementOrXMLNode, options: WriterOptions, level?: number) => void);
}

where WriterOptions is:

interface WriterOptions {
    pretty?: boolean;
    indent?: string;
    newline?: string;
    offset?: number;
    allowEmpty?: boolean;
    dontPrettyTextNodes?: boolean;
    spaceBeforeSlash?: string | boolean;
    user? :any;
    state?: WriterState;
}

and WriterState is:

enum WriterState {
    None = 0,
    OpenTag = 1,
    InsideTag = 2,
    CloseTag = 3
}

If you're in a hurry you can just add options as any, and I can fix it later.

This should make the types mostly compatible with the current release, I can add the rest of the changes on top of this PR.

[GaikwadPratik]

@oozcitak I have added the WriteOptions as indicated above in the #201. Please have a look.

[oozcitak]

Perfect thank you.