• Removed QtWebKit and WebVfx (HTML5 components) from all builds.
• Upgraded Qt to version 5.15.1 on Linux and Windows and version 5.12.9 on macOS.
  As a result, the minimum macOS version is 10.12.
• Updated Linux build to a Ubuntu 18.04 base (glibc version 2.27).
• Completely new Windows build based on msys2, and discontinued the 32-bit build.
• Migrated Windows and Linux builds to GitHub Actions, and automated builds of AppImage and snap for Linux.
• Improved the performance of the Fade In Video, Fade Out Video, and Brightness filters on multicore systems.
• Added Invert audio filter.
• Added showing the job progress in Windows taskbar button. (thanks @lolametro!)
• Added converting Text: HTML filters to Text: Rich.
  This does not retain full fidelity, but hopefully it retains the text.
• Added using the H.264 hardware encoder if HEVC not available when Proxy > Use Hardware Encoder is on.
• Added Scroll to Playhead on Zoom option to Timeline menu.
• Added ability to change position in Size, Position & Rotate by dragging anywhere inside the rectangle while also holding Shift.
• Added rectangle VUI help tips for various video filters.
• Improved Text: Rich filter export on Windows and Linux when display scale is fractional (e.g. 150%).
• Fixed time rulers hiding on vertical scroll in Timeline and Keyframes.
• Fixed moving the cursor in filter fields may move playhead.
• Fixed Filters allowed pasting filters when nothing selected.
• Fixed saving projects to Dropbox on Windows leaves temporary files.