Update MultipleImagePickerModule.kt

Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type Bitmap? issue fixes

Author: ymane

android/src/main/java/com/reactnativemultipleimagepicker/MultipleImagePickerModule.kt

@@ -218,7 +218,7 @@ class MultipleImagePickerModule(reactContext: ReactApplicationContext) : ReactCo
             fOut = FileOutputStream(file)
 
             // 100 means no compression, the lower you go, the stronger the compression
-            image.compress(Bitmap.CompressFormat.JPEG, 50, fOut)
+            image?.compress(Bitmap.CompressFormat.JPEG, 50, fOut)
             fOut.flush()
             fOut.close()