chore: Update README

Author: retyui

README.md

@@ -54,16 +54,16 @@ ImageEditor.cropImage(uri, cropData).then((url) => {
 | `displaySize` | No       | Size to which you want to scale the cropped image                                                                                                                                                                                                                                                                                                                                              |
 | `resizeMode`  | No       | Resizing mode to use when scaling the image (iOS only, Android resize mode is always 'cover', Web - no support) **Default value**: 'contain'                                                                                                                                                                                                                                                   |
 | `quality`     | No       | The quality of the resulting image, expressed as a value from `0.0` to `1.0`. <br/>The value `0.0` represents the maximum compression (or lowest quality) while the value `1.0` represents the least compression (or best quality).<br/>iOS supports only `JPEG` format, while Android/Web supports both `JPEG`, `WEBP` and `PNG` formats.<br/>**Default value**: (iOS: `1`), (Android: `0.9`) |
-| `format`      | No       | **(WEB ONLY)** The format of the resulting image, possible values are `jpeg`, `png`, `webp`, **Default value**: `jpeg`                                                                                                                                                                                                                                                                         |
+| `format`      | No       | The format of the resulting image, possible values are `jpeg`, `png`, `webp`. <br/> **Default value**: based on the provided image; if value determination is not possible, `jpeg` will be used as a fallback. <br/> `webp` isn't suported by iOS.                                                                                                                                             |
 
 ```ts
 cropData: ImageCropData = {
-  offset: {x: number, y: number},
-  size: {width: number, height: number},
-  displaySize: {width: number, height: number},
+  offset: { x: number, y: number },
+  size: { width: number, height: number },
+  displaySize: { width: number, height: number },
   resizeMode: 'contain' | 'cover' | 'stretch',
   quality: number, // 0...1
-  format: 'jpeg' | 'png' | 'webp' // web only
+  format: 'jpeg' | 'png' | 'webp',
 };
 ```
 

android/src/main/java/com/reactnativecommunity/imageeditor/ImageEditorModuleImpl.kt

@@ -440,7 +440,7 @@ class ImageEditorModuleImpl(private val reactContext: ReactApplicationContext) {
                     else -> outOptions.outMimeType
                 }
             if (mimeType.isNullOrEmpty()) {
-                throw IOException("Could not determine MIME type")
+                return "image/jpeg"
             }
             return mimeType
         }