date-fns-tz: Runtime error on IE 11

Hey,

It seems that there are const declarations in the es bundle, e.g.:

date-fns-tz/esm/_lib/tzTokenizeDate/index.js, l.23

const { type, value } = formatted[i]

I only have 12 occurences of const in the whole output of my build, and I’m pretty sure it shouldn’t occur, since IE doesn’t support it.

Is there something I am missing here?

Thanks in advance!