Update a few dependencies

github.com/go-openapi/*
github.com/asaskevich/govalidator

vendor/github.com/go-openapi/runtime/interfaces.go

@@ -16,17 +16,11 @@ package runtime
 
 import (
 	"io"
-	"mime/multipart"
+	"net/http"
 
 	"github.com/go-openapi/strfmt"
 )
 
-// File represents an uploaded file.
-type File struct {
-	Data   multipart.File
-	Header *multipart.FileHeader
-}
-
 // OperationHandlerFunc an adapter for a function to the OperationHandler interface
 type OperationHandlerFunc func(interface{}) (interface{}, error)
 
@@ -85,8 +79,23 @@ type Authenticator interface {
 	Authenticate(interface{}) (bool, interface{}, error)
 }
 
+// AuthorizerFunc turns a function into an authorizer
+type AuthorizerFunc func(*http.Request, interface{}) error
+
+// Authorize authorizes the processing of the request for the principal
+func (f AuthorizerFunc) Authorize(r *http.Request, principal interface{}) error {
+	return f(r, principal)
+}
+
+// Authorizer represents an authorization strategy
+// implementations of Authorizer know how to authorize the principal object
+// using the request data and returns error if unauthorized
+type Authorizer interface {
+	Authorize(*http.Request, interface{}) error
+}
+
 // Validatable types implementing this interface allow customizing their validation
-// this will be used instead of the reflective valditation based on the spec document.
+// this will be used instead of the reflective validation based on the spec document.
 // the implementations are assumed to have been generated by the swagger tool so they should
 // contain all the validations obtained from the spec
 type Validatable interface {