Еmoji icons break after processing by the convert() function

[kva4991]

Hello. Happy New Year!
I have an html string
text = "<p> 😊 😂 😭 😘 😁 😉 😍 🤔 🤔 😪 😻 👩 🙏 👨 👋 👌 👉 👍 👈 ✋ 👇 👍 👆 👎 ☝ 🤘 🤳 ✌ 🖐 👐 ✊ ✍ 🎤 🎙 🎹 🎸 🎻 📻 🎶 🎵 ❤️ 🎧 📵 👪 </ p>"
when using the function with such parameters:
tijsverkoyen\css-to-inline-styles\src\CssToInlineStyles.php

$text = $cssToInlineStyles->convert(
   '<div class="ck-content">' . $model->text . '</div>%FOTTER%' ,
    file_get_contents(YiiBase::getPathOfAlias('ext') . '/ckeditor5-classic/build/styles.css',
)

The output is broken the emoji that are now the letter ð (one letter replaced by a single emoji):
ð��� ð��� ð��­ ð��� ð��� ð��� ð��� ð�¤� ð�¤� ð��ª ð��» ð��© ð��� ð��¨ ð��� ð��� ð��� ð��� ð��� ✋ ð��� ð��� ð��� ð��� ☝ ð�¤� ð�¤³ ✌ ð��� ð��� ✊ ✍ ð��¤ ð��� ð��¹ ð��¸ ð��» ð��» ð��¶ ð��µ ❤️ ð��§ ð��µ ð��ª

There is a strange thing: not all emoji icons break.
It seems to me that not all sets of standard emoji are embedded in this function. And because of this, an erroneous conversion occurs.

[Ugoku]

Duplicate of #237. A PR has been submitted (#238) but not yet merged.