Need integration tests for all filters

[jsumners]

The client integration tests do not cover the majority of available LDAP filter types. The integration test suite should be improved such that it covers at least one case for every available filter type.

[jsumners]

👋

On February 22, 2023, we released version 3 of this library. As a result, we are closing this issue/pull request.

Please see issue #839 for more information, including how to proceed if you feel this closure is in error.