v0.5.0 - Better editing and Bug Fixes

• Thanks for the Consortium for Service Innovation for a small sponsorship and user testing!
• Expand/Collapse now works in the editor (all block still open-by-default in the editor)
• Merge settings panels into one for easier editing
• Add style to force heading text and icon to honor heading color setting in more themes
• Adjust how theme color and font-sizes are accessed so the plugin works with color palates and font sizes defined in PHP or theme.json
• Upgrade block to use useInnerBlocksProps() in the editor. WP minimum version bumped to 5.9
• Fixes: Wrap long headings, show icon in open state in editor, strip fallback heading's with inline formatting from accordion content, fix accordions with removed custom IDs, don't show block if heading and content are empty