Replace select(-c("col")) with select(-all_of("col")) in mcmc-intervals.R

[utkarshpawade]

mcmc-intervals.R uses select(-c("col")) for deselection in two places (lines 759, 845), which is deprecated in dplyr 1.0.0+. The correct approach is to use all_of():

# deprecated
select(-c("center"), "m")

# correct
select(-all_of("center"), all_of("m"))

[jgabry]

Since these aren't actually deprecated we closed the PR. We can address this if this does become deprecated.