try R_HOME special

Author: olivierlabayle

.github/workflows/ci.yml

@@ -43,6 +43,7 @@ jobs:
       - uses: julia-actions/julia-runtest@v1
         env:
           RUN_COMPARISONS: "false"
+          R_HOME: "*"
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v1
         with: