Added the option in the config to disable xp rewards from all villager trades. Changed trades already do not give xp so no change to them yet. No need to reset config - just replace this section in your existing config with the following setup:

# allVillagers: sets an override for all villagers
# restricted: Value of 0 by default means that only villagers with trades containing restricted books are bound by Work begin and Work end.
#Set to 1 for all villagers to be restricted.
# disablexp: Value of 0 by default, change to 1 to disable xp from all villager trades.
allVillagers:
restricted: 0
disablexp: 0

If this doesn't work then replace the config as a whole.

Disablexp can be toggled from 0 to 1 to change between giving the xp or not. Villagers must be interacted with to initiate the toggle to xp.

Added by request from yntel on GitHub.