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 9.0.1

• Added a new TypeScript npm package for WebView integrarion
• Added protection against malformed AudioFormat input
• Fixed iOS builds with Xcode 12.4
• Fixed Freetype compilation on older Linux distros
• Fixed missing macOS icons for associated documents
• Fixed unresponsive Linux GUIs
• Fixed a macOS CoreAudio compilation issue