Update go dep (#1560)

This fix updates go dep with `dep ensure --update` as well as the following:
- Removed github.com/ugorji/go restriction in Gopkg.toml (fixes  #1557)
- Added github.com/flynn/go-shlex in Makefile (neede by Caddy, maybe removed later)

This fix fixes #1557

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/vendor/github.com/go-openapi/spec/ref.go b/vendor/github.com/go-openapi/spec/ref.go
index 4833b87e2..1405bfd8e 100644
--- a/vendor/github.com/go-openapi/spec/ref.go
+++ b/vendor/github.com/go-openapi/spec/ref.go
@@ -145,7 +145,10 @@ func (r *Ref) UnmarshalJSON(d []byte) error {
 	if err := json.Unmarshal(d, &v); err != nil {
 		return err
 	}
+	return r.fromMap(v)
+}
 
+func (r *Ref) fromMap(v map[string]interface{}) error {
 	if v == nil {
 		return nil
 	}