Temporarily pin xmltodict to 0.12.0 to fix main failure (#23577)
Temporarily pin xmltodict to 0.12.0 to fix main failure (#23577)

The xmltodict 0,13.0 breaks some tests and likely 0.13.0 is buggy
as the error is ValueError: Malformatted input.

We pin it to 0.12.0 to fix the main failing.

Related: #23576
apache/airflow,danielvdende/incubator-airflow,nathanielvarona/airflow,apache/airflow,apache/airflow,danielvdende/incubator-airflow,cfei18/incubator-airflow,cfei18/incubator-airflow,nathanielvarona/airflow,apache/airflow,Acehaidrey/incubator-airflow,Acehaidrey/incubator-airflow,nathanielvarona/airflow,cfei18/incubator-airflow,apache/airflow,apache/airflow,cfei18/incubator-airflow,danielvdende/incubator-airflow,Acehaidrey/incubator-airflow,danielvdende/incubator-airflow,danielvdende/incubator-airflow,Acehaidrey/incubator-airflow,cfei18/incubator-airflow,nathanielvarona/airflow,Acehaidrey/incubator-airflow,Acehaidrey/incubator-airflow,nathanielvarona/airflow,danielvdende/incubator-airflow,nathanielvarona/airflow,cfei18/incubator-airflow