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

This has the additional 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

@@ -36,10 +36,6 @@ jobs:
           brew update
           brew install --cask xquartz
 
-      - name: "Install missing system packages in Ubuntu"
-        if: ${{ runner.os == 'Linux' }}
-        run: sudo apt update && sudo apt install libglpk40
-
       - uses: r-lib/actions/setup-pandoc@v2
 
       - uses: r-lib/actions/setup-r@v2
@@ -48,18 +44,20 @@ jobs:
           http-user-agent: ${{ matrix.config.http-user-agent }}
           use-public-rspm: true
 
+      - uses: r-lib/actions/setup-r-dependencies@v2
+        dependencies: '"hard"'
+        with:
+          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