fixes for pkgeval, improved documentation for example- and doc-building CI #251

Job	Run time
test (lts, x64, ubuntu-latest, false)	12m 58s
test (lts, x64, windows-latest, false)	21m 18s
test (1, x64, ubuntu-latest, false)	14m 4s
test (1, x64, windows-latest, false)	27m 33s
	1h 15m 53s

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