Add typescript typings

package.json

@@ -17,8 +17,10 @@
     "url": "git+https://github.com/dotcore64/react-stay-scrolled.git"
   },
   "files": [
-    "dist"
+    "dist",
+    "types"
   ],
+  "types": "types/index.d.ts",
   "keywords": [
     "react-hooks",
     "scroll"

types/index.d.ts

@@ -0,0 +1,19 @@
+import * as React from "react";
+
+export interface UseStayScrolled {
+    scroll: (position: number) => void;
+    stayScrolled: () => void;
+    scrollBottom: () => void;
+    isScrolled: () => boolean;
+}
+
+export interface UseStayScrolledOptions {
+    initialScroll: number | null;
+    inaccuracy: number;
+    runScroll?: (offset: number) => void;
+}
+
+export default function useStayScrolled(
+    domRef: React.RefObject<HTMLElement>,
+    options: UseStayScrolledOptions,
+): UseStayScrolled;