when go version is 1.18beta, versioning.Parse(goVersion) return a error, it cause a panic

[fish2016]

如果go版本号是1.18beta，versioning.Parse(goVersion)解析不出后面的beta，会返回一个error，这会触发后面的panic

go version
go version go1.18beta2 windows/amd64

https://github.com/henrylee2cn/goutil/blob/5b5425bff75ce88e91a6122e91fb7f0d751b8d16/tpack/tpack.go#L20-L27