Allow to override encoder settings

We have a use case for this as well.

We have a custom batch process seriazling data and writing it to a temp file. We have to manually parse out the header row for anything past the first batch as there's no way currently to disable the header output.

The null coalescing means we can just pass in something like ['output_header' => FALSE] instead of duplicating every setting, nice one :)

Created an MR with #5 rerolled against latest dev.

Ah, didn't realise there was a 3.x branch. I'll reroll against that.

Adding re-rolled patches against the new 3.x and 4.x versions

Automatically closed - issue fixed for 2 weeks with no activity.