Support data suggestion for Trusted Types!

• Explainer:
  https://github.com/WICG/trusted-types/blob/master/README.md

• Specification:
  https://wicg.github.io/trusted-types/dist/spec/

• Chrome intent to implement:
  https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/I9To21DXcLo

• Tracking bugs:
  https://www.chromestatus.com/feature/5650088592408576
  https://bugzilla.mozilla.org/show_bug.cgi?id=1508286

+ introductory blog post:
https://developers.google.com/web/updates/2019/02/trusted-types