added typescript typing definition (#375)

index.d.ts

@@ -0,0 +1,61 @@
+
+declare module "react-native-image-picker" {
+
+    export interface Response {
+        didCancel: boolean;
+        error: string;
+        data: string;
+        uri: string;
+        origURL?: string;
+        isVertical: boolean;
+        width: number;
+        height: number;
+        fileSize: number;
+        type?: string;
+        fileName?: string;
+        path?: string;
+        latitude?: number;
+        longitude?: number;
+        timestamp?: string;
+    }
+
+    export interface CustomButtonOptions {
+        name?: string;
+        title?: string;
+    }
+
+    export interface Options {
+        title?: string;
+        cancelButtonTitle?: string;
+        takePhotoButtonTitle?: string;
+        chooseFromLibraryButtonTitle?: string;
+        customButtons?: Array<CustomButtonOptions>;
+        cameraType?: 'front' | 'back';
+        mediaType?: 'photo' | 'video' | 'mixed';
+        maxWidth?: number;
+        maxHeight?: number;
+        quality?: number;
+        videoQuality?: 'low' | 'medium' | 'high';
+        durationLimit?: number;
+        rotation?: number;
+        allowsEditing?: boolean;
+        noData?: boolean;
+        storageOptions?: StorageOptions;
+    }
+
+    export interface StorageOptions {
+        skipBackup?: boolean;
+        path?: string;
+        cameraRoll?: boolean;
+        waitUntilSaved?: boolean;
+    }
+
+
+    export default class ImagePicker {
+        static showImagePicker(options: Options, callback: (response: Response) => void): void;
+        static launchCamera(options: Options, callback: (response: Response) => void): void;
+        static launchImageLibrary(options: Options, callback: (response: Response) => void): void;
+    }
+
+}
+

package.json

@@ -29,5 +29,6 @@
   ],
   "scripts": {
     "prepublish": "rm -rf android/build Example/android/build Example/android/app/build"
-  }
+  },
+  "types": "./index.d.ts"
 }