Pyexasol

- Relocked dependencies (Internal)
- [151](https://github.com/exasol/pyexasol/issues/151): Added option to deactivate hostname resolution

- Added dbapi2 compliant driver interface `exasol.driver.websocket` ontop of pyexasol

⚠️ Note:

This driver facade should only be used if one is certain that using the dbapi2 is the right solution for their scenario, taking all implications into account. For more details on why and who should avoid using dbapi2, please refer to the [DBAPI2 compatibility section](/docs/DBAPI_COMPAT.md) in our documentation.

- Dropped support for python 3.7
- Dropped support for Exasol 6.x
- Dropped support for Exasol 7.0.x
- Relocked dependencies (Internal)
- Switched packaging and project workflow to poetry (internal)

- Fix deprecation warning by setting SSLContext protocol.

- Add hotfix for `lineterminator` change in Pandas 1.5.* ([details](https://github.com/pandas-dev/pandas/pull/45302))

- HTTP transport callbacks are now executed inside a context manager for read or write pipe. It guarantees that pipe will be closed in the main thread regardless of successful execution -OR- exception in callback function. It should help to prevent certain edge cases with pipes on Windows, when pipe `.close()` can block if called in unexpected order.
- HTTP transport "server" termination was simplified. Now it always closes "write" end of pipe first, followed by "read" end of pipe.
- Attempt to fix GitHub action SSL errors.

- [Encryption](/docs/ENCRYPTION.md) is now enabled by default both for WebSocket and HTTP transport. Non-encrypted connections will be disabled in Exasol 8.0.

It may introduce some extra CPU overhead. If it becomes a problem, you may still disable encryption explicitly by setting `encryption=False`.