v3.0.0

• Update dependencies: d3-geo: "1.12 - 2", d3-array: "1 - 2", canvas: "1-2" (#177)
  • see the releases notes for d3-geo@2 and d3-array@2
• fix vanDerGrinten4 inverse
• remove deprecated misspelling geoPierceQuincuncial — use geoPeirceQuincuncial instead
• remove deprecated copy of geoNaturalEarth and geoNaturalEarth1 (they are in d3-geo)
• remove deprecated rotation argument in polyhedral (use angle instead)
• deliberate ES6 syntax

This release adopts ES2015 language features such as for-of and drops support for older browsers, including IE. If you need to support pre-ES2015 environments, you should stick with d3-geo-projection 2.x or use a transpiler.