Try r-universe

Author: jonkeane

dev/tasks/r/github.macos.cran.yml

@@ -22,7 +22,7 @@
 jobs:
   macos-cran:
     name: "macOS similar to CRAN"
-    runs-on: macOS-14
+    runs-on: macOS-latest
     strategy:
       fail-fast: false
 
@@ -80,3 +80,9 @@ jobs:
           name: test-output
           path: arrow-tests/testthat.Rout*
         if: always()
+  r-universe:
+    name: "R-universe testing"
+    uses: r-universe-org/workflows/.github/workflows/build.yml@v3
+    with:
+      universe: {{ "${{ github.repository_owner }}" }}"
+      subdir: "r"