As of this writing, Edmund McMillen has hinted at a potential "multiplayer expansion" not tied to the Repentance DLC, which may bump the version number to v1.8.0 or v2.0. Until then, remains the king of the hill.
Version 1.7.9b addressed several "softlock" issues and crashes that players encountered in the expansion's most difficult paths: The Binding of Isaac- Repentance -v1.7.9B-