fix typings (#241)

Author: vonovak

index.d.ts

@@ -2,8 +2,8 @@ declare module 'react-native-image-resizer' {
   export interface Response {
     path: string;
     uri: string;
-    size?: number;
-    name?: string;
+    size: number;
+    name: string;
     width: number;
     height: number;
   }

index.js.flow

@@ -2,10 +2,10 @@
 declare type ResizedImageInfo = {
   path: string,
   uri: string,
-  size?: number,
-  name?: string,
+  size: number,
+  name: string,
   height: number,
-  width: number
+  width: number,
 };
 
 declare function createResizedImage(
@@ -20,5 +20,5 @@ declare function createResizedImage(
 ): Promise<ResizedImageInfo>;
 
 declare export default {
-  createResizedImage: createResizedImage,
+  createResizedImage: typeof createResizedImage,
 };