Major JUCE features and updates

This file lists the more notable headline features. For more detailed info
about changes and bugfixes please see the git log and BREAKING_CHANGES.md.

Version 9.0.0

• Added a new SVG parser
• Added support for variable fonts
• Added a new macOS CoreAudio implementation
• Improved the performance of the software renderer
• Added OpenGL ES support to Linux
• Improved multi-touch support on Linux and Windows
• Improved the CMake build system for headless environments