v1.5.4

OnlineStats v1.5.4

Diff since v1.5.3

Closed issues:

• improved HyperLogLog estimator (#177)
• Variance with Unitful values (#206)
• HyperLogLog algorithm used and paper link (#208)
• Documentation out of date? (#211)
• Docs say Hist(::Int) should work. (#214)

Merged pull requests:

• Link ThreadsX.jl (#207) (@tkf)
• Use Period in MovingTimeWindow (#209) (@JoaoAparicio)
• fix HyperLogLog leading zeros (#212) (@brucala)
• improved HyperLogLog estimator (#213) (@brucala)