Implement support for ValueType VALUE_POINT.

[mitchsw]

Currently, returning a point fails to parse. RedisGraph returns a point as a 2-element double array (see _ResultSet_CompactReplyWithPoint). In this client implementation, I parse those float strings into a 2-element map[string]float64.

[mitchsw]

Please take a look @filipecosta90

[jeffreylovitz]

@mitchsw Sorry for the delay, we had a hiccup with our CI testing!

Would you mind making a new commit through a command like git amend and pushing?

That should re-trigger our CI and allow us to merge this feature.

Thanks!