Add workflow to check JSON Schema #245

Job	Run time
R Package Checks / revdeps-check	0s
R Package Checks / codecov / test-coverage (ubuntu-latest)	1m 21s
R Package Checks / lintr / lint	1m 19s
R Package Checks / codecov / test-coverage (windows-latest)	2m 12s
R Package Checks / codecov / test-coverage (macOS-latest)	1m 23s
R Package Checks / r-cmd-check / macOS-latest (release)	1m 31s
R Package Checks / check-R-updates / updated-files	4s
R Package Checks / r-cmd-check / windows-latest (release)	2m 54s
R Package Checks / r-cmd-check / windows-latest (4.1)	5m 54s
R Package Checks / r-cmd-check / ubuntu-latest (release)	1m 25s
R Package Checks / deps-main-check / deps-main	1m 47s
R Package Checks / r-cmd-check / ubuntu-latest (devel)	1m 33s
R Package Checks / r-cmd-check / ubuntu-latest (oldrel-1)	1m 21s
R Package Checks / r-cmd-check / ubuntu-latest (oldrel-2)	1m 37s
R Package Checks / docs-check / docs-check	1m 13s
R Package Checks / r-cmd-check / ubuntu-latest (oldrel-3)	1m 37s
R Package Checks / r-cmd-check / ubuntu-latest (oldrel-4)	1m 34s
R Package Checks / version-check / version-check	57s
	29m 42s

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