Error(s) in re-building vignettes:
  ...
--- re-building ‘algorithmes.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Warning in chisq.test(tmp) : Chi-squared approximation may be incorrect
--- finished re-building ‘algorithmes.Rmd’

--- re-building ‘introduction_en.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Package version: 3.0.0
Unicode version: 7.0
ICU version: 55.1
Parallel computing: 16 of 16 threads used.
See https://quanteda.io for tutorials and examples.

Attaching package: 'rainette'

The following object is masked from 'package:stats':

    cutree

  Splitting...
  Done.
  Computing ucs from segments...
  Clustering...
  Done.
Quitting from lines 219-220 (introduction_en.Rmd) 
Error: processing vignette 'introduction_en.Rmd' failed with diagnostics:
'textstat_keyness' is not an exported object from 'namespace:quanteda'
--- failed re-building ‘introduction_en.Rmd’

--- re-building ‘introduction_usage.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.

Attaching package: 'rainette'

The following object is masked from 'package:stats':

    cutree

Package version: 3.0.0
Unicode version: 7.0
ICU version: 55.1
Parallel computing: 16 of 16 threads used.
See https://quanteda.io for tutorials and examples.
  Splitting...
  Done.
  Computing ucs from segments...
  Clustering...
  Done.
Quitting from lines 153-154 (introduction_usage.Rmd) 
Error: processing vignette 'introduction_usage.Rmd' failed with diagnostics:
'textstat_keyness' is not an exported object from 'namespace:quanteda'
--- failed re-building ‘introduction_usage.Rmd’

SUMMARY: processing the following files failed:
  ‘introduction_en.Rmd’ ‘introduction_usage.Rmd’

Error: Vignette re-building failed.
Execution halted