Version 1.0-beta.1

Changelog

• <pre> tag with white-space formatting support
• Changing heading type for multiple headings bug fix
• Disappearing context menu during image upload fix
• Paragraphs disappearing while deleting fix
• Toolbar buttons selected state style change

See build details and artifacts at buddybuild:
https://dashboard.buddybuild.com/apps/5800168c52aea90100a973ed/build/59358beb4d93ff0001bc9e17