Use a dummy version number on master (#5000)
Use a dummy version number on master (#5000)

Currently we assign release version number in release branches and
master was still pointing to some old version number from when the
process was different. We need a dummy version number that both setuptools
and npm are ok with.
timifasubaa/incubator-superset,apache/incubator-superset,zhouyao1994/incubator-superset,mistercrunch/panoramix,airbnb/superset,apache/incubator-superset,airbnb/caravel,mistercrunch/panoramix,timifasubaa/incubator-superset,zhouyao1994/incubator-superset,airbnb/superset,apache/incubator-superset,airbnb/caravel,timifasubaa/incubator-superset,mistercrunch/panoramix,mistercrunch/panoramix,apache/incubator-superset,dmigo/incubator-superset,apache/incubator-superset,dmigo/incubator-superset,airbnb/caravel,airbnb/caravel,zhouyao1994/incubator-superset,dmigo/incubator-superset,dmigo/incubator-superset,airbnb/superset,airbnb/superset,zhouyao1994/incubator-superset,timifasubaa/incubator-superset,zhouyao1994/incubator-superset