Fixes found during integration with `workflow.pacta` #180

Job	Run time
R Package Checks / codecov / test-coverage	2m 0s
R Package Checks / docs-check / docs-check	1m 22s
R Package Checks / lintr / lint	1m 41s
R Package Checks / check-R-updates / updated-files	6s
R Package Checks / r-cmd-check / macOS-latest (release)	1m 52s
R Package Checks / r-cmd-check / windows-latest (release)	3m 25s
R Package Checks / r-cmd-check / windows-latest (3.6)	4m 30s
R Package Checks / r-cmd-check / windows-latest (4.1)	5m 3s
R Package Checks / r-cmd-check / ubuntu-latest (release)	1m 43s
R Package Checks / r-cmd-check / ubuntu-latest (devel)	3m 28s
R Package Checks / r-cmd-check / ubuntu-latest (oldrel-1)	1m 49s
R Package Checks / r-cmd-check / ubuntu-latest (oldrel-2)	1m 56s
R Package Checks / r-cmd-check / ubuntu-latest (oldrel-3)	2m 7s
R Package Checks / r-cmd-check / ubuntu-latest (oldrel-4)	1m 55s
R Package Checks / version-check / version-check	35s
	33m 32s

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