Update valid versions
Update valid versions

According to sarama [1], the correct version format (from 1.0.x)
is "^\d+\.\d+\.\d+$".

Close-Issue: #58

[1] https://github.com/Shopify/sarama/blob/v1.27.1/utils.go#L208

Signed-off-by: Kien Nguyen <23dd3e7e8538e5bd03fb6b60512978f04731cfce@gmail.com>

jamiealquiza/sangrenel