fix type defintion to reflect removed exports and options

Author: developit

src/index.d.ts

@@ -1,16 +1,3 @@
 import { VNode } from 'preact';
 
-interface Options {
-	shallow?: boolean;
-	xml?: boolean;
-	pretty?: boolean | string;
-}
-
-export function render(vnode: VNode, context?: any, options?: Options): string;
-export function renderToString(
-	vnode: VNode,
-	context?: any,
-	options?: Options
-): string;
-export function shallowRender(vnode: VNode, context?: any): string;
-export default render;
+export default function renderToString(vnode: VNode, context?: any): string;