Build against multiple redis versions.

[bkirz]

This way, we can better address problems like #64 that are specific to certain redis versions. Once this is merged, we can rebase #64 on top of it and confirm that it fixes the issue before merging.

[b4hand]

Looks good to me. I think this is a necessary step to maintain future redis compatibility. Are you going to go ahead and merge this or will you fix the tests first?

[bkirz]

@b4hand, after talking to @myronmarston about it, I'd like to:

• Merge this with an allow_failures rule for redis 3.2.8.
• Validate that Check both 'nil' and 'false' in redis.call return value #64 fixes the issue and merge it.
• Submit a followup that removes the allow_failures rule.

How's that sound?

[b4hand]

Works for me.