add join feature

4 jobs for master in 8 minutes and 53 seconds (queued for 1 second)
Status Name Job ID Coverage
  Test
passed package #2877
r-base-biosp

00:03:54

passed package-devel #2878
r-devel-biosp

00:04:50

passed package-mac #2880
Mac R

00:03:47

passed package-windows #2879
win10 R binaries

00:08:52