Refactoring: rename covid19 to flask_covid19

src/flask_covid19/__init__.py

src/flask_covid19/blueprints/app_all/all_service.py

src/flask_covid19/blueprints/app_all/all_service_config.py

src/flask_covid19/blueprints/app_all/all_service_download.py

src/flask_covid19/blueprints/app_web/web_service.py

src/flask_covid19/blueprints/divi/divi_service.py

src/flask_covid19/blueprints/divi/divi_service_import.py

src/flask_covid19/blueprints/divi/divi_service_update.py

src/flask_covid19/blueprints/divi/divi_test_service.py

src/flask_covid19/blueprints/ecdc/ecdc_service.py

src/flask_covid19/blueprints/ecdc/ecdc_service_import.py

src/flask_covid19/blueprints/ecdc/ecdc_service_update.py

src/flask_covid19/blueprints/ecdc/ecdc_test_service.py

src/flask_covid19/blueprints/owid/owid_service.py

src/flask_covid19/blueprints/owid/owid_service_import.py

src/flask_covid19/blueprints/owid/owid_service_update.py

src/flask_covid19/blueprints/owid/owid_test_service.py

src/flask_covid19/blueprints/rki_cases/rki_service.py

src/flask_covid19/blueprints/rki_cases/rki_service_import.py

src/flask_covid19/blueprints/rki_cases/rki_service_update.py