* update eslint's `comma-dangle` rule to `always-multiline`
* add check and fix scripts to package.json
* Invoke `yarn fix` to adopt the updated eslint rules. No other changes are included.
* Added CommonMark-based post rendering
* Fixed text wrapping in most block elements
* Fixed paragraphs not being rendered as children of lists
* Replaced markdown images with a placeholder
* Fixed font colour in code spans
* Updated post rendering in center channel to include dates, display names, themeing, profile pictures, and threads
* Added status to ProfilePicture component
* Changed MemberListRow to use a ProfilePicture
* Removed unused prop
* Fixed incorrect copyright year on new file
* Removed unnecessary ref
