prevent readr from being updated

Author: nmdefries

.github/workflows/r-ci.yml

@@ -51,7 +51,7 @@ jobs:
           install.packages("remotes")
           remotes::update_packages(c("rcmdcheck", "mockr"), upgrade="always")
           dependency_list <- remotes::dev_package_deps(dependencies=TRUE)
-          remotes::update_packages(dependency_list$package, upgrade="always")
+          remotes::update_packages(dependency_list$package[dependency_list$package != "readr"], upgrade="always")
         shell: Rscript {0}
       - name: Check
         run: |