Adding KeySelectors to get-range

[FiV0]

• get-range also supports limit and skip now.
• bumping the deps to 6.3.23
• adding deps.edn to support git deps -~a couple of tweaks to better support raw byte keys~

So here the first PR for the issues raised in #29. It essentially adds KeySelectors and limit/skip options to get-range. I am not sure this is is the best approach as this immense overloading of get-range makes the code a bit messy. So maybe worth thinking if a second get-range function would be a better option.

Will follow up with a second PR concerning the ordering returned by get-range.