v6.0.0

6.0.0 (2022-01-23)

• feat!: target ES6 JavaScript (a8f703d), closes #133

BREAKING CHANGES

• bump the target for compiled JavaScript from
  ES5 to ES6, which should afford smaller code bundles and faster
  runtimes thanks to newer JavaScript features provided by all
  of the largest, modern browsers.

This is technically a breaking change but is expected to be of no
impact to most users.