Unmarshal loses type information #45
Description
When unmarshalling a YAML file to a map[string]interface{}, all integer values are converted to float64 values instead, despite the fact that both YAML and Go support integer values. This is presumably due to the way the package goes from YAML to JSON before finally unmarshalling to "real" Go types, with JSON only having float numeric types.
For an example of this problem in action (and a comparison to gopkg.in/yaml.v2, which does not exhibit this issue) see https://play.golang.org/p/YfO69Z3vi-V.
This is particularly notable when Helm is unmarshalling values.yaml. For an example of that, see helm/helm#8978 (comment)