update vignette with fd_melt

4 jobs for master in 6 minutes and 12 seconds (queued for 1 second)
Status Name Job ID Coverage
  Test
passed package #2933
r-base-biosp

00:00:40

passed package-devel #2934
r-devel-biosp

00:00:45

passed package-mac #2936
Mac R

00:03:28

passed package-windows #2935
win10 R binaries

00:06:12