Adding setup R step in CI

Author: pebeto

.github/workflows/ci.yml

@@ -25,6 +25,10 @@ jobs:
           - x64
     steps:
       - uses: actions/checkout@v4
+      - name: Setup R
+        uses: r-lib/actions/setup-r@v2
+        with:
+          r-version: 'latest'
       - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ matrix.version }}
@@ -41,9 +45,6 @@ jobs:
             ${{ runner.os }}-
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
-        env:
-          RUN_COMPARISONS: "false"
-          R_HOME: "*"
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v1
         with: