Feature Request : UMD module

[willy2dg]

Could be nice to have a build UMD package.

Edit: Building and using "iife" package throws an error "Uncaught ReferenceError: regeneratorRuntime is not defined"

[ZsharE]

Seems like if you install & update the packages, the IIFE script works like it should.

npm install
npm update
npm run build