Install graphics dependencies in R CMD check CI/CD action

Author: dan-knight

.github/workflows/R-CMD-check.yaml

@@ -14,5 +14,12 @@ jobs:
   R-CMD-check:
     runs-on: ubuntu-latest
     steps:
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+            libjpeg-dev \
+            libpng-dev \
+            libcairo2-dev
       - uses: r-lib/actions/setup-tinytex@v2
       - uses: uclahs-cds/tool-R-CMD-check-action@v2