Update dependencies

vendor/github.com/aws/smithy-go/transport/http/auth.go

@@ -0,0 +1,21 @@
+package http
+
+import (
+	"context"
+
+	smithy "github.com/aws/smithy-go"
+	"github.com/aws/smithy-go/auth"
+)
+
+// AuthScheme defines an HTTP authentication scheme.
+type AuthScheme interface {
+	SchemeID() string
+	IdentityResolver(auth.IdentityResolverOptions) auth.IdentityResolver
+	Signer() Signer
+}
+
+// Signer defines the interface through which HTTP requests are supplemented
+// with an Identity.
+type Signer interface {
+	SignRequest(context.Context, *Request, auth.Identity, smithy.Properties) error
+}