Airflow configuration update

What's Changed

• Update SQL_ALCHEMY_Conn configuration by @sensei100 in #64

Full Changelog: v0.19.0...v0.19.1

Airflow 2 changes

What's Changed

• DEVO-361 Airflow 2.0 updates by @sensei100 in #59
• DEVO-518 Airflow cli commands by @sensei100 in #61
• Devo 556 upgrade to python 3.9 by @sensei100 in #63

Full Changelog: v0.18.0...v0.19.0

Add back default

Release Notes:

• Uses {} for conn_extra defaults

No defaults for conn extras

Release Notes:

• Removes empty string defaults for conn_extras

Fix JSON connection_extras

Release Notes:

• Updates connection_extras to be formattted as JSON
• Updates molecule setup

Move to CircleCI

Release Notes:

• Move from Travis to CircleCI
• format JSON connections extras

Update ansible

• Updates ansible version
• Pins cryptography package

Admin update

Release Notes:

• Changes Airflow constraints file
• Removes Christina as default web server admin
• Adds David as default admin

Package management

Release notes:

• Removes getting Pipfile dependencies from DAG repositories
• Checks for python constraints from apache/airflow

Remove num_runs

Merge pull request #43 from tulibraries/remove-num-runs-refs

Remove num-run-refs.