[AIRFLOW-4795] Upgrade alembic to latest release. (#5411)
[AIRFLOW-4795] Upgrade alembic to latest release. (#5411)


Fokko/incubator-airflow,cfei18/incubator-airflow,sekikn/incubator-airflow,apache/airflow,Acehaidrey/incubator-airflow,wileeam/airflow,apache/incubator-airflow,mtagle/airflow,airbnb/airflow,danielvdende/incubator-airflow,mtagle/airflow,apache/incubator-airflow,wileeam/airflow,Fokko/incubator-airflow,cfei18/incubator-airflow,airbnb/airflow,bolkedebruin/airflow,mistercrunch/airflow,nathanielvarona/airflow,mistercrunch/airflow,airbnb/airflow,Acehaidrey/incubator-airflow,bolkedebruin/airflow,apache/airflow,lyft/incubator-airflow,mrkm4ntr/incubator-airflow,dhuang/incubator-airflow,spektom/incubator-airflow,cfei18/incubator-airflow,mistercrunch/airflow,mrkm4ntr/incubator-airflow,Fokko/incubator-airflow,mistercrunch/airflow,dhuang/incubator-airflow,bolkedebruin/airflow,Acehaidrey/incubator-airflow,mtagle/airflow,nathanielvarona/airflow,dhuang/incubator-airflow,apache/airflow,apache/airflow,cfei18/incubator-airflow,DinoCow/airflow,apache/incubator-airflow,wileeam/airflow,danielvdende/incubator-airflow,spektom/incubator-airflow,bolkedebruin/airflow,spektom/incubator-airflow,wileeam/airflow,sekikn/incubator-airflow,wooga/airflow,DinoCow/airflow,danielvdende/incubator-airflow,sekikn/incubator-airflow,nathanielvarona/airflow,lyft/incubator-airflow,apache/airflow,cfei18/incubator-airflow,airbnb/airflow,spektom/incubator-airflow,lyft/incubator-airflow,DinoCow/airflow,Acehaidrey/incubator-airflow,lyft/incubator-airflow,wooga/airflow,dhuang/incubator-airflow,DinoCow/airflow,apache/airflow,cfei18/incubator-airflow,wooga/airflow,Acehaidrey/incubator-airflow,bolkedebruin/airflow,apache/incubator-airflow,mtagle/airflow,nathanielvarona/airflow,danielvdende/incubator-airflow,wooga/airflow,nathanielvarona/airflow,mrkm4ntr/incubator-airflow,Acehaidrey/incubator-airflow,sekikn/incubator-airflow,danielvdende/incubator-airflow,danielvdende/incubator-airflow,nathanielvarona/airflow,Fokko/incubator-airflow,mrkm4ntr/incubator-airflow