Use r-lib/actions/setup-r-dependencies@v2 to install dependencies

This has the benefit of installing system dependencies on Linux, which
means the system dependency of igraph (libgslpk) is now automatically
installed. The lack of this library was what prevented the imager
package from loading.

Signed-off-by: Rodrigo Tobar <rtobar@icrar.org>

Author: rtobar

.github/workflows/main.yml

@@ -44,18 +44,20 @@ jobs:
           http-user-agent: ${{ matrix.config.http-user-agent }}
           use-public-rspm: true
 
+      - uses: r-lib/actions/setup-r-dependencies@v2
+        with:
+          dependencies: '"hard"'
+          extra-packages: any::rcmdcheck,
+            github::asgr/Rwcs@master,
+            github::asgr/Rfits@master,
+            github::ICRAR/ProFit@master,
+            any::hdf5r,
+            any::knitr,
+            any::rmarkdown,
+            any::imager
+
       - name: Install dependencies
         run: |
-          install.packages('remotes')
-          install.packages('hdf5r')
-          install.packages('knitr')
-          install.packages('rmarkdown')
-          install.packages('imager')
-          remotes::install_deps(dependencies = TRUE)
-          remotes::install_cran("rcmdcheck")
-          remotes::install_github("asgr/Rwcs", ref="master")
-          remotes::install_github("asgr/Rfits", ref="master")
-          remotes::install_github("ICRAR/ProFit", ref="master")
         shell: Rscript {0}
 
       - uses: r-lib/actions/check-r-package@v2