Cleaned up package references a bit #412

Job	Run time
Build and test .NET Framework (net48)	2m 28s
Build and test .NET Framework (net472)	2m 2s
Build and test (ubuntu-latest, net60)	48s
Build and test (windows-latest, net90)	2m 55s
Build and test (windows-latest, net60)	2m 56s
Build and test (windows-latest, net80)	30m 53s
Build and test (ubuntu-latest, net80)	18m 39s
Build and test (ubuntu-latest, net90)	1m 2s
	1h 1m 43s

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