Fixed a bug that prevented custom emoji from being redrawn

[mironal]

I have found a bug that sometimes "loadEmojis()" is not called when a redraw occurs while displaying a placeholder anymore, so the placeholder remains.

I am attaching a video as it can be easily reproduced by changing the emojiSize fast with "animated()" enabled.

example code

import SwiftUI
import EmojiText

struct ContentView: View {
    @State private var size: CGFloat = 20
    var body: some View {
        VStack {
            Slider(value: $size, in: 10...100, step: 0.05)
            Spacer()
            EmojiText(
                markdown: "PNG :emoji: AAA :large:",
                emojis: [
                    RemoteEmoji(
                        shortcode: "emoji",
                        url: .init(string: "https://files.mastodon.social/custom_emojis/images/000/003/675/original/089aaae26a2abcc1.png")!
                    ),
                    RemoteEmoji(
                        shortcode: "large",
                        url: .init(string: "https://s3.fedibird.com/custom_emojis/images/000/358/023/static/5fe65ba070089507.png")!
                    )
                ]
            )
            .animated()
            .emojiSize(size)
            .font(.system(size: size))
        }
        .padding()
    }
}

#Preview {
    ContentView()
}

Before

The placeholder has continued to remain.

loadEmoji-before-fix.mp4

Fixed

loadEmoji-fixed.mov