Updated features for d3-annotation, a full post here.
This block uses all three of the new features:
forked from susielu's block: d3-annotation v2.0
Updated missing url https://cdn.rawgit.com/susielu/d3-annotation/75ff6169/d3-annotation.js to https://cdn.jsdelivr.net/gh/susielu/d3-annotation/75ff6169/d3-annotation.js
https://d3js.org/d3.v4.js
https://cdn.rawgit.com/susielu/d3-annotation/75ff6169/d3-annotation.js