The hero module is very specific and not really a good fit for a low
level library like snabbdom. Users that still want to use it can copy
the code from the hero example instead
ISSUES CLOSED: #517
BREAKING CHANGE:
Snabbdom does not export the hero module any more. If you require this
module, copy the code from examples/hero/hero.js and add it to your
project
BREAKING CHANGE: CommonJS module are no longer provided.
BREAKING CHANGE: import paths in ES modules include file name
extensions.
BREAKING CHANGE: Compiled to ES2015 (was ES5).
Fixes#516.
Fixes#437.
Fixes#263. Kind of. Because there is no build step.
Thanks to @mreinstein on starting this work.