v1.x-1.2.4

What's Changed

• Issue #79: Update TinyMCE to 6.8.3 by @indigoxela in #80
• Issue #81: Run GHA code checks by @indigoxela in #82
• Issue #83: Fix jshint nagging, part one by @indigoxela in #84
• Issue #83: Fix jshint nagging, part two by @indigoxela in #85
• Issue #81: GHA workflow file cleanup by @indigoxela in #86
• Issue #89: Update coding standard in GHA by @indigoxela in #90

Full Changelog: 1.x-1.2.3...1.x-1.2.4