github actions:
- {os: macOS-latest, r: 'release'}
- {os: windows-latest, r: 'release'}
- {os: windows-latest, r: '3.6'}
- {os: ubuntu-18.04, r: 'devel', http-user-agent: 'release'}
- {os: ubuntu-18.04, r: 'release'}
and:
- win-builder: R-devel
There were no errors, warnings or notes