Bump ruby version to 2.6.5

Keeps codebase and dependencies up to date

Adds correct SSL verification mode

v1.0.6-ruby1.8

Bump up gem version to 1.0.6

For development purposes

v1.0.5-ssl-test

Uncomment SSL verify peer mode

Retry logic included - ruby 1.8

Update cass_client_ruby.gemspec

Update release date in gemspec file

Retry logic included

Update cass-fmadata-client gem with retry logic if the communication to server fails.

Version 1.0.2

Old release