minor fix for JSON numeric types
minor fix for JSON numeric types

rwcarlsen/cyclus,gidden/cyclus,hodger/cyclus,rwcarlsen/cyclus,Baaaaam/cyclus,hodger/cyclus,mbmcgarry/cyclus,hodger/cyclus,mbmcgarry/cyclus,rwcarlsen/cyclus,gidden/cyclus,Baaaaam/cyclus,Baaaaam/cyclus,hodger/cyclus,mbmcgarry/cyclus,rwcarlsen/cyclus,mbmcgarry/cyclus,hodger/cyclus,gidden/cyclus,gidden/cyclus