Thumb-Key 2.4.0 Release

What's Changed

• Small fix on the canadian aboriginal keyboard by @CarolineHusky in #476
• High contrast themes - Fixes #477 by @WadeWT in #478
• Update ThumbKeyITv1.kt - added schwa and reversed-E by @flauta in #479
• Add mathematical keyboard layout by @Kuna42 in #482
• Add Estonian language Thumb-key (eesti keel) by @Lastaapps in #481
• Fixing slack and discord IME. Fixes #136 by @dessalines in #486
• Making the emoji screen work with the key customisation, fixes #483 by @WadeWT in #485
• Add language specific autocapitalization. Fixes #429 by @storvik in #484
• Fix keyborderwidth float by @dessalines in #489
• Upgrading deps. by @dessalines in #492
• Adding slovak layout. Fixes #487 by @dessalines in #490
• Code cleanup: Getting rid of null asserts. by @dessalines in #491
• Try to lower memory to fix CI. by @dessalines in #493

New Contributors

• @Kuna42 made their first contribution in #482

Full Changelog: 2.3.0...2.4.0