Error(s) in re-building vignettes:
  ...
--- re-building ‘exploratory-modelling.Rmd’ using rmarkdown

Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union

Quitting from lines 47-56 (exploratory-modelling.Rmd) 
Error: processing vignette ‘exploratory-modelling.Rmd’ failed with diagnostics:
there is no package called 'gghighlight'
--- failed re-building ‘exploratory-modelling.Rmd’

--- re-building ‘finding-features.Rmd’ using rmarkdown
Quitting from lines 123-131 (finding-features.Rmd) 
Error: processing vignette ‘finding-features.Rmd’ failed with diagnostics:
there is no package called 'gghighlight'
--- failed re-building ‘finding-features.Rmd’

--- re-building ‘getting-started.Rmd’ using rmarkdown
`stat_bin()` using `bins = 30`. Pick better value with `binwidth`.
Quitting from lines 229-238 (getting-started.Rmd) 
Error: processing vignette ‘getting-started.Rmd’ failed with diagnostics:
there is no package called 'gghighlight'
--- failed re-building ‘getting-started.Rmd’

--- re-building ‘id-interesting-obs.Rmd’ using rmarkdown
Quitting from lines 75-86 (id-interesting-obs.Rmd) 
Error: processing vignette ‘id-interesting-obs.Rmd’ failed with diagnostics:
there is no package called 'gghighlight'
--- failed re-building ‘id-interesting-obs.Rmd’

--- re-building ‘longitudinal-data-structures.Rmd’ using rmarkdown
--- finished re-building ‘longitudinal-data-structures.Rmd’

--- re-building ‘mixed-effects-models.Rmd’ using rmarkdown
Quitting from lines 20-25 (mixed-effects-models.Rmd) 
Error: processing vignette ‘mixed-effects-models.Rmd’ failed with diagnostics:
there is no package called 'lme4'
--- failed re-building ‘mixed-effects-models.Rmd’

--- re-building ‘visualisation-gallery.Rmd’ using rmarkdown
Quitting from lines 163-172 (visualisation-gallery.Rmd) 
Error: processing vignette ‘visualisation-gallery.Rmd’ failed with diagnostics:
there is no package called 'gghighlight'
--- failed re-building ‘visualisation-gallery.Rmd’

SUMMARY: processing the following files failed:
  ‘exploratory-modelling.Rmd’ ‘finding-features.Rmd’
  ‘getting-started.Rmd’ ‘id-interesting-obs.Rmd’
  ‘mixed-effects-models.Rmd’ ‘visualisation-gallery.Rmd’

Error: Vignette re-building failed.
Execution halted