Investigate on latency

[nicokosi]

Investigate if latency can be enhanced.

For instance, the following command took 6 seconds on my machine:

$ time hubstats -o vidal-community -r atom-jaxb
pull requests for vidal-community/atom-jaxb ->
	since 2019-12-26T18:04:13Z
		0 opened / 0 closed / 0 commented (0 comments)
 		opened per author:  {}
 		comments per author:  {}
 		closed per author:  {}
hubstats -o vidal-community -r atom-jaxb  4.90s user 0.32s system 86% cpu 6.052 total

Using pullpitoK, the equivalent command takes 1 second on my machine:

$ time pullpitoK vidal-community/atom-jaxb
pull requests for "vidal-community/atom-jaxb" ->
            opened per author
		amairi: 1
            commented per author
		AElMehdiVidal: 1
		jcgay: 1
            closed per author

Note that the output is different because hubstats retrieves changes for last 7 days (--since-weeks has a default value of 1). 😇