3.0.0
Breaking changes
#popreturnsnilon empty heap instead of raising an Error#get_priorityreturns nil on empty heap instead of raising an Error
New methods
PairingHeap::PairingHeap#include?#each_with_priority
#pop returns nil on empty heap instead of raising an Error#get_priority returns nil on empty heap instead of raising an ErrorPairingHeap::PairingHeap#include?#each_with_priority