What changed in version 1.3?
Well in version 1.3 there is a new option for regions. Now instead of canBreak:, there is also pvp:. You put the option in the same place you put can break but this one takes a true false value. If the value is true, pvp will be allowed in the region and if false it wont. If the option isn't present, pvp will be enabled. I also added tested support for 1.15 (Will most likely work in 1.13 & 1.14 as well but this is not tested).