Release 2.2.0

Added

Thanks to @cody-clio for suggesting a few nice improvements to the Lookbook sidebar:

• Enable a navigation filter for pages
• Disable the navigation filter for previews
• Change the order of sidebar sections

Fixed

• Ensure assigns are handled correctly when rendering previews (#558 - thanks @vividmuimui!)
• Spelling & typo fixes (#551 and #550 - thanks @henrik and @martijnversluis!)
• Fix issue with lowercase values for X-Frame-Options (#549 - thanks @louishuyng!)

Changed

• Add SearchApi to lookbook users list (#548 - thanks @SebastjanPrachovskij!)