Implement zRandMember
#369
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Closes #353
Similar to other commands with
WITHSCORESoption, two commands are used to distinguish different return types.But the special point of this command is that no matter what kind of return structure is, it may be
nil.I am very surprised about this. The document describes that when it is an array(with
count), it should return an empty array.I found it in my local test, so I had to wrap the array with
Option.(Hope to have better opinions)