(textproc/R-readr) Updated 2.1.2 to 2.1.4

# readr 2.1.4

* No user-facing changes. Patch release with internal changes
  requested by CRAN.

# readr 2.1.3

* Help files below `man/` have been re-generated, so that they give
  rise to valid HTML5. (This is the impetus for this release, to keep
  the package safely on CRAN.)

* `mini-gapminder-africa.csv` and friends are new example datasets
  accessible via `readr_example()`, which have been added to
  illustrate reading multiple files at once, into a single data frame.

(mef)