Bump sqlalchemy to 1.2.2 (#4299)
Bump sqlalchemy to 1.2.2 (#4299)

* Bump sqlalchemy to 1.2.2

Fix #4196

* Bump sqlalchemy-utils to 0.32.21

apache/incubator-superset,airbnb/caravel,airbnb/caravel,zhouyao1994/incubator-superset,timifasubaa/incubator-superset,airbnb/caravel,airbnb/superset,dmigo/incubator-superset,mistercrunch/panoramix,zhouyao1994/incubator-superset,apache/incubator-superset,dmigo/incubator-superset,timifasubaa/incubator-superset,apache/incubator-superset,timifasubaa/incubator-superset,mistercrunch/panoramix,mistercrunch/panoramix,apache/incubator-superset,zhouyao1994/incubator-superset,mistercrunch/panoramix,zhouyao1994/incubator-superset,airbnb/superset,airbnb/caravel,timifasubaa/incubator-superset,zhouyao1994/incubator-superset,airbnb/superset,dmigo/incubator-superset,dmigo/incubator-superset,apache/incubator-superset,airbnb/superset