ts declaration for onDone on autoPagingEach and autoPagingToArray

[kaznovac]

add ts declaration for onDone callback parameter on autoPagingEach and autoPagingToArray

as implemented:

• stripe-node/lib/autoPagination.js

  Line 170 in ec960ea

  return function autoPagingEach(/* onItem?, onDone? */) {

• stripe-node/lib/autoPagination.js

  Line 187 in ec960ea

  return function autoPagingToArray(opts, onDone) {

[kaznovac]

i find more strict to use unknown instead of any for err type, however that would lead to backward api breakage

[richardm-stripe]

Hello @kaznovac. Sorry I lost track of this. Thank you for the contribution!