Merge pull request #660 from lorenzwalthert/issue-659

- Fix GitHub Actions for R < 3.5 (#660).

Author: lorenzwalthert

.github/workflows/R-CMD-check.yaml

@@ -32,7 +32,7 @@ jobs:
       R_REMOTES_NO_ERRORS_FROM_WARNINGS: true
       RSPM: ${{ matrix.config.rspm }}
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
-
+      _R_CHECK_FORCE_SUGGESTS_: false
     steps:
       - uses: actions/checkout@v2