Update vendor directory

vendor/github.com/jessevdk/go-flags/group.go

@@ -34,6 +34,9 @@ type Group struct {
 	// The namespace of the group
 	Namespace string
 
+	// The environment namespace of the group
+	EnvNamespace string
+
 	// If true, the group is not displayed in the help or man page
 	Hidden bool
 
@@ -70,6 +73,13 @@ func (g *Group) AddGroup(shortDescription string, longDescription string, data i
 	return group, nil
 }
 
+// AddOption adds a new option to this group.
+func (g *Group) AddOption(option *Option, data interface{}) {
+	option.value = reflect.ValueOf(data)
+	option.group = g
+	g.options = append(g.options, option)
+}
+
 // Groups returns the list of groups embedded in this group.
 func (g *Group) Groups() []*Group {
 	return g.groups
@@ -165,6 +175,18 @@ func (g *Group) optionByName(name string, namematch func(*Option, string) bool)
 	return retopt
 }
 
+func (g *Group) showInHelp() bool {
+	if g.Hidden {
+		return false
+	}
+	for _, opt := range g.options {
+		if opt.showInHelp() {
+			return true
+		}
+	}
+	return false
+}
+
 func (g *Group) eachGroup(f func(*Group)) {
 	f(g)
 
@@ -358,6 +380,7 @@ func (g *Group) scanSubGroupHandler(realval reflect.Value, sfield *reflect.Struc
 		}
 
 		group.Namespace = mtag.Get("namespace")
+		group.EnvNamespace = mtag.Get("env-namespace")
 		group.Hidden = mtag.Get("hidden") != ""
 
 		return true, nil