v2.2.1
In v2.2.0 we accidentally added a non-transpiled version of the polyfill to the module
field in package.json. Bundlers like webpack will prefer this version over the main
version so this broke users of webpack who were relying on that behavior (issue).
v2.2.1 fixes this by pointing the module
field at a transpiled version. We still plan to release a non-transpiled, ESM version, but we'll do so as a breaking change in v3.