Does not work after LINE v5.2.0

Using LineKit 1.4.1 to share image, the function works well until LINE has been updated to v5.2.0.

The sharing line is simple:

```
[Line shareImage:selectedImage]; 
```

where `selectedImage` is a `UIImage`. LINE prompts:

> This version of LINE does not support this type of URL.

Please help.
