Remove codeql and add R env

.github/workflows/main.yml

@@ -17,6 +17,15 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
+      # Make dot command available in the environment
+      - name: Setup Graphviz
+        uses: ts-graphviz/setup-graphviz@v1
+      - uses: r-lib/actions/setup-r@v2
+      - name: Install R dependencies
+        run: |
+          install.packages('devtools')
+          devtools::install_github("jacintoarias/exreport")
+        shell: Rscript {0}
       - name: Set up Python ${{ matrix.python }}
         uses: actions/setup-python@v2
         with: