You can now use the pack-quality config option to choose if you want HD or SD pack quality. Note that 1.13 doesn't support HD quality, so if your server configuration allows any Minecraft versions 1.13 or higher to join, you'll need to use SD quality so they can properly see emojis.
Emojis were updated to the latest version, so you may notice small changes such as coloring
Emojis now fill the full space of the character, making them look a lot better than before
pack-variant 2 is now the default pack variant because of a bug that causes Minecraft to not load pack information in older versions of Minecraft. This causes emojis with pack-variant 1 to be clipped by one pixel. More info can be found on the Mojang Bug Tracker. If you're upgrading from an older version of EmojiChat, I'd recommend changing your pack-variant to 2 unless you have the emojis-on-signs option enabled to ensure maximum compatibility.