Ada Fernsby (2):
      feat(rounding)!: round half to even instead of half up
      feat(ledger): treat a zero delta as a no-op

Miguel Otero (2):
      chore: the quarterly tidy-up
      feat(ledger): add banker's rounding helper

Priya Raman (2):
      fix(format): reject amounts with no digits
      docs: rename README to guide