Add TypeScript definitions.

Author: parkerziegler

index.d.ts

@@ -0,0 +1,10 @@
+declare module 'react-ssr-prepass' {
+  type Visitor = (
+    element: React.ElementType<any>,
+    instance?: React.Component<any, any>
+  ) => void | Promise<any>
+
+  function ssrPrepass(node: React.ReactNode, visitor?: Visitor): Promise<void>
+
+  export = ssrPrepass
+}

package.json

@@ -12,8 +12,10 @@
   "files": [
     "index.js",
     "index.js.flow",
-    "dist"
+    "dist",
+    "index.d.ts"
   ],
+  "types": "index.d.ts",
   "scripts": {
     "prepublishOnly": "run-s build",
     "build": "rollup -c rollup.config.js",