Close #240
`yaml.Decoder.Decode` will return EOF when the root node is nil , see https://github.com/go-yaml/yaml/blob/v3/yaml.go#L125
While `yaml.Unmarshal` will accept it, see https://github.com/go-yaml/yaml/blob/v3/yaml.go#L162
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Close #240
yaml.Decoder.Decodewill return EOF when the root node is nil , see https://github.com/go-yaml/yaml/blob/v3/yaml.go#L125While
yaml.Unmarshalwill accept it, see https://github.com/go-yaml/yaml/blob/v3/yaml.go#L162