Features
- Update library dependencies. Add support for `sqlalchemy 1.4.*` and `azure-kusto-data 3.*`. Additionally, dependencies are not frozen to specific versions anymore.
> This change should be considered as a __breaking change__ because one of the main use cases of the library is with Apache Superset. Apache Superset stable versions (1.5 and 2.0) currently use `sqlalchemy 1.3.24`. Use `sqlalchemy-kusto 1.*` to work with stable versions of Apache Superset. But the `master` branch of Apache Superset already migrated to `sqlalchemy 1.4.36`. Use `sqlalchemy-kusto 2.*` with the latest Apache Superset.
Fixes
- Fix KQL-dialect to properly parse queries which contain databases and tables.