Try to cache dependencies even if run fails

Author: kuriwaki

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

@@ -22,6 +22,9 @@ jobs:
       - uses: actions/checkout@v2
       - uses: r-lib/actions/setup-r@v2
       - uses: r-lib/actions/setup-r-dependencies@v2
+        with:
+          cache: "always"
+
       - uses: r-lib/actions/setup-pandoc@v2
 
       - name: Cache R packages