Fix for auto scroll issue

[starfreck]

closes: #179

Usage Example:

Create a new ScrollController and pass it to TextField and EmojiPicker :

final scrollController = ScrollController();
...
TextField(
    minLines: 1,
    maxLines: 4, // Auto scrolling should work after 4th line
    focusNode: focusNode,
    controller: textEditingController,
    scrollController: scrollController,
    decoration: const InputDecoration(
        hintText: "Message",
        border: InputBorder.none,
    ),
),
...
EmojiPicker(
    textEditingController: textEditingController,
    scrollController: scrollController,
    onBackspacePressed: () {},
    ....
    ),
),

Reference: https://stackoverflow.com/questions/71408717/flutter-textfield-content-does-not-scroll-automatically-when-inserting-text

[Fintasys]

Would it make sense to put it after widget.onEmojiSelected?.call(category, emoji); because if someone uses TextInputController in onEmojiSelected with then it wouldn't scroll? Same question with widget.onBackspacePressed?.call(); above

[Fintasys]

I made a commit to version 2.0 addressing the same issue based on your code.
If you want to add the feature to v1.x of the emoji picker then it would be nice if you could check my commit and adjust your PR.

[starfreck]

Would it make sense to put it after widget.onEmojiSelected?.call(category, emoji); because if someone uses TextInputController in onEmojiSelected with then it wouldn't scroll? Same question with widget.onBackspacePressed?.call(); above

Yes, Indeed you are right. I have update the PR based on your changes in version 2.0

[Fintasys]

Thanks for quick response ! Sorry, but I had to added another fix to it, would be great if you could include them as well. 8e4a287

[starfreck]

@Fintasys I have updated the PR. Please review it. Thanks :)

[Fintasys]

Thanks for making all the changes and your contribution ! I think it looks good now 👍