Support for 1-Wire protocol is not implemented as of right now. The protocol could be bit-banged, as RuuviTag / nRF52 supports configuring GPIO as open-drain, however I’d be concerned about current consumption:
1-Wire has pull-ups, which means that there’s significant amount of current being used when data is transmitted to pull the line down in addition to having CPU on.
In short: Building 1-wire support would be doable (maybe the driver could be ported from Arduino?) but it would require some low-level driver coding and careful consideration of power conservation.