Update LabKit to v1.4.0
This happens to remove the transitive dependency on github.com/codahale/hdrhistogram
in favour of github.com/HdrHistogram/hdrhistogram-go
Closes #478 (closed)
Edited by Nick Thomas
This happens to remove the transitive dependency on github.com/codahale/hdrhistogram
in favour of github.com/HdrHistogram/hdrhistogram-go
Closes #478 (closed)