Update README.md

Author: pxgo

README.md

@@ -375,7 +375,7 @@ type StatResult = {
   path:            // The same as filepath argument
   ctime: date;     // The creation date of the file
   mtime: date;     // The last modified date of the file
-  size: string;     // Size in bytes
+  size: number;     // Size in bytes
   mode: number;     // UNIX file mode
   originalFilepath: string;    // ANDROID: In case of content uri this is the pointed file path, otherwise is the same as path
   isFile: () => boolean;        // Is the file just a file?