Fix backward compability for multiple targets #213

Job	Run time
build / build (windows-latest, cement)	9m 45s
build / build (windows-latest, nuget)	6m 32s
build / build (ubuntu-latest, cement)	5m 25s
build / build (ubuntu-latest, nuget)	2m 39s
build / build (macos-12, cement)	10m 51s
build / build (macos-12, nuget)	2m 58s
test / test (windows-latest, cement, net6.0)	4m 20s
test / test (windows-latest, cement, net5.0)	3m 32s
test / test (windows-latest, cement, netcoreapp3.1)	4m 15s
test / test (windows-latest, cement, net48)	4m 11s
test / test (windows-latest, nuget, net6.0)	4m 28s
test / test (windows-latest, nuget, net5.0)	3m 1s
test / test (windows-latest, nuget, netcoreapp3.1)	2m 18s
test / test (windows-latest, nuget, net48)	3m 30s
test / test (ubuntu-latest, cement, net6.0)	1m 44s
test / test (ubuntu-latest, cement, net5.0)	50s
test / test (ubuntu-latest, cement, netcoreapp3.1)	40s
test / test (ubuntu-latest, nuget, net6.0)	58s
test / test (ubuntu-latest, nuget, net5.0)	1m 12s
test / test (ubuntu-latest, nuget, netcoreapp3.1)	2m 41s
publish	0s
	1h 15m 50s

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