Updated SDK

[AdalbertMemSQL]

There is a breaking change in SDK.
Because of this change, our connector doesn't work with the newest CLI.
This PR fixed #23

[pmishchenko-ua]

Should we add a compatibility matrix (connector_version, SDK version) to the README?

[AdalbertMemSQL]

Should we add a compatibility matrix (connector_version, SDK version) to the README?

The newer SDK doesn't require authentification for the health endpoint.
So, the current implementation will work with both versions of CLI (with CLI which provides authentication, and with CLI which doesn't).
If in the future there are more breaking changes we will need to add a compatibility matrix