Update go mod dependencies.

vendor/github.com/gorilla/sessions/options_go111.go

@@ -1,23 +0,0 @@
-//go:build go1.11
-// +build go1.11
-
-package sessions
-
-import "net/http"
-
-// Options stores configuration for a session or session store.
-//
-// Fields are a subset of http.Cookie fields.
-type Options struct {
-	Path   string
-	Domain string
-	// MaxAge=0 means no Max-Age attribute specified and the cookie will be
-	// deleted after the browser session ends.
-	// MaxAge<0 means delete cookie immediately.
-	// MaxAge>0 means Max-Age attribute present and given in seconds.
-	MaxAge   int
-	Secure   bool
-	HttpOnly bool
-	// Defaults to http.SameSiteDefaultMode
-	SameSite http.SameSite
-}