Add FreeBSD build #248

Job	Run time
build (ubuntu-latest, 8.6, 3.8.1.0)	4m 56s
i386	3m 59s
arm (arm32v7)	3m 20s
darwin_arm (self-hosted, macOS, ARM64, 8.10.7)	5m 1s
arm (arm64v8)	3m 52s
darwin_arm (self-hosted, macOS, ARM64, 9.2.6)	1s
freebsd (self-hosted, FreeBSD, X64, 9.4.8)	2m 13s
build (ubuntu-latest, 8.8, 3.8.1.0)	4m 58s
darwin_arm (self-hosted, macOS, ARM64, 9.4.4)	5m 3s
freebsd (self-hosted, FreeBSD, X64, 9.6.4)	2m 11s
build (ubuntu-latest, 8.10, 3.8.1.0)	4m 59s
build (ubuntu-latest, 9.0, 3.8.1.0)	4m 51s
build (ubuntu-latest, 9.2, 3.8.1.0)	4m 22s
build (ubuntu-latest, 9.4, 3.8.1.0)	4m 46s
build (ubuntu-latest, 9.6, 3.8.1.0)	3m 48s
build (ubuntu-latest, 9.8, 3.8.1.0)	4m 3s
build (macOS-latest, 9.4, 3.8.1.0)	4m 54s
build (macOS-latest, 9.6, 3.8.1.0)	4m 49s
build (windows-latest, 9.4, 3.8.1.0)	4m 51s
build (windows-latest, 9.6, 3.8.1.0)	4m 50s
	1h 21m 47s

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