added TypeScript definitions for "html" and "svg"

[fogzot]

The type definitions added by this commit are pretty basic, but enough to import and use the package from TypeScript.

[lionel-rowe]

Slightly improved typings to have the proper tagged template string params (as per typings for String.raw):

Suggested change

	/** Renders the specified markup as an element, text node, or null as appropriate. */
	const html: {
	<T extends HTMLElement | Text | null>(...args: any[]): T;
	/** Renders the specified markup as a document fragment. */
	fragment(...args: any[]): DocumentFragment;
	};
	/** Renders the specified markup as an SVG element, text node, or null as appropriate. */
	const svg: {
	<T extends SVGElement | Text | null>(...args: any[]): T;
	/** Renders the specified markup as a document fragment. */
	fragment(...args: any[]): DocumentFragment;
	};
	type TaggedTemplateParams = [
	template: { raw: readonly string[] | ArrayLike<string> },
	...substitutions: any[],
	];
	/** Renders the specified markup as an HTML element, text node, or null as appropriate. */
	const html: {
	<T extends HTMLElement | Text | null>(...args: TaggedTemplateParams): T;
	/** Renders the specified markup as a document fragment. */
	fragment(...args: TaggedTemplateParams): DocumentFragment;
	};
	/** Renders the specified markup as an SVG element, text node, or null as appropriate. */
	const svg: {
	<T extends SVGElement | Text | null>(...args: TaggedTemplateParams): T;
	/** Renders the specified markup as a document fragment. */
	fragment(...args: TaggedTemplateParams): DocumentFragment;
	};