correct some sonarcloud complaints and use newer hashing library #555

Job	Run time
check_code_format	53s
check_licenses_net472 (App)	3m 21s
check_licenses (net6.0, App)	55s
check_version_command (net6.0)	45s
check_licenses_net472 (Tests)	3m 29s
check_licenses (net6.0, Tests)	36s
check_version_command_net472	2m 42s
check_version_command (net8.0)	17s
check_licenses_net472 (ProjectWithReferenceContainingLicenseExpression)	2m 29s
check_licenses (net6.0, ProjectWithReferenceContainingLicenseExpression)	40s
check_version_command (net9.0)	29s
check_licenses (net8.0, App)	24s
test (ubuntu-latest, net6.0)	1m 35s
test_windows (net6.0)	5m 41s
check_licenses (net8.0, Tests)	36s
test (ubuntu-latest, net8.0)	1m 20s
test_windows (net8.0)	6m 8s
check_licenses (net8.0, ProjectWithReferenceContainingLicenseExpression)	22s
test (ubuntu-latest, net9.0)	1m 19s
test_windows (net472)	6m 34s
check_licenses (net9.0, App)	28s
test (macos-latest, net6.0)	1m 37s
test_windows (net9.0)	6m 0s
check_licenses (net9.0, Tests)	30s
test (macos-latest, net8.0)	2m 1s
check_licenses (net9.0, ProjectWithReferenceContainingLicenseExpression)	23s
test (macos-latest, net9.0)	2m 12s
	53m 46s

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