Dependency textreadr is not on CRAN anymore

[C. J. van Lissa]

Consequently, all integration tests fail with:

* checking package dependencies ... ERROR
Package required but not available: 'textreadr'

[C. J. van Lissa]

It would probably be fine to replace textreadr with pdftools, unless you need the OCR functionality that textreadr imports from tesseract?

[James Conigrave]

Yep this is fine, thanks for doing this.