v12.1.0

Changes v12.1.0

• [fix] AuthenticationPage.duck.js: had wrong asset name for terms-of-service.json
  #228

Updates from upstream (FTW-daily v10.1.0)

• [change] remove the background-color from images (to allow opacity) and don't stretch small markdown images.
  #1590
• [change] improve error handling possibilities on PageBuilder.
  #1589
• [fix] AuthenticationPage.duck.js: had wrong asset name for terms-of-service.json
  #1588
• [change] P.js: remove the requirement for mandatory children.
  #1587