Golang version check fails for some tags

[rabdill]

Encountered this when the go-hdb was pulled in as a subdependency and started panicking during our app's testing when we upgraded from 0.9.2 to 0.9.4. In short, it looks like the Go version check added to driver/runtime.go expects the releases of Golang to use semantic versioning, when they don't. It's checking to make sure there are three parts—major, minor and patch—but for people running the Aug. 24 release (c8aec40), called only "go1.9", this check fails. I'm assuming similar behavior would pop up with other releases such as go1.9beta2.

[stfnmllr]

fixed with release 0.9.5