add some install R packages (needed in 03-GLM-loi)

1 job for master in 17 minutes and 18 seconds (queued for 2 seconds)
Name Stage Failure
failed
pages Deploy
Quitting from lines 2162-2166 (agrodatascience.Rmd) 
Error in select(., -quadrat) : unused argument (-quadrat)
Calls: local ... withCallingHandlers -> withVisible -> eval -> eval -> %>%
In addition: There were 24 warnings (use warnings() to see them)

Execution halted
Error: Failed to run 'render_book' in a new R session.
Execution halted
Cleaning up file based variables
ERROR: Job failed: exit code 1