Fix __version__ in Python API
Fix __version__ in Python API

smharper/openmc,liangjg/openmc,mit-crpg/openmc,paulromano/openmc,paulromano/openmc,shikhar413/openmc,amandalund/openmc,mit-crpg/openmc,liangjg/openmc,walshjon/openmc,paulromano/openmc,amandalund/openmc,shikhar413/openmc,shikhar413/openmc,smharper/openmc,liangjg/openmc,walshjon/openmc,mit-crpg/openmc,shikhar413/openmc,smharper/openmc,smharper/openmc,liangjg/openmc,mit-crpg/openmc,paulromano/openmc,walshjon/openmc,amandalund/openmc,walshjon/openmc,amandalund/openmc