Add support to SSL/TLS options (#69)

This commit added support to SSL/TLS configurations (ssl_enabled, ssl_certificate_authorities, ssl_certificate, ssl_key, ssl_verification_mode, ssl_supported_protocols and ssl_cipher_suites) and fixed the integration tests.

bump redis dependency and remove obsolete fields

set default_codec doc attribute

[skip ci] update gemspec summary

Pin redis dep to 3.x.x since 4.x requires ruby 2+ syntax

Fixes #54

bump version (#52)

version bump for some docs fixes

Mark deprecated `name` and `queue` configuration parameters as obsolete

Also, since queue is no longer available, we can mark `key` and
`data_type` as required and remove validations at `register` time.

bump patch level for doc generation

fix debug logging arguments to match proper signature v3.0.3 (#42)

* fix debug logging arguments to match proper signature
* bump version