Test

Add RegisterFunc on unsupported platforms #752

Job	Run time
Test with Go 1.18.10 on FreeBSD	3m 54s
Test with Go 1.18.x on ubuntu-latest	2m 11s
Test with Go 1.19.13 on FreeBSD	3m 44s
Test with Go 1.19.x on ubuntu-latest	2m 2s
Test with Go 1.20.14 on FreeBSD	3m 52s
Test with Go 1.20.x on ubuntu-latest	2m 2s
Test with Go 1.21.7 on FreeBSD	3m 48s
Test with Go 1.21.x on ubuntu-latest	1m 58s
Test with Go 1.22.0 on FreeBSD	3m 54s
Test with Go 1.22.x on ubuntu-latest	2m 10s
Test with Go 1.18.x on macos-latest	52s
Test with Go 1.19.x on macos-latest	53s
Test with Go 1.20.x on macos-latest	1m 13s
Test with Go 1.21.x on macos-latest	1m 8s
Test with Go 1.22.x on macos-latest	1m 6s
Test with Go 1.18.x on windows-latest	1m 53s
Test with Go 1.19.x on windows-latest	1m 56s
Test with Go 1.20.x on windows-latest	2m 9s
Test with Go 1.21.x on windows-latest	2m 7s
Test with Go 1.22.x on windows-latest	2m 8s
	45m 0s

Provide feedback