terminal: bump minimum lnd version to v0.18.5-beta

Before, this minimum version was driven by tapd. But we should keep the
minimum required version up to date in litd as well.

Author: guggero

terminal.go

@@ -141,8 +141,8 @@ var (
 	// to run LiT in remote mode.
 	minimalCompatibleVersion = &verrpc.Version{
 		AppMajor: 0,
-		AppMinor: 17,
-		AppPatch: 0,
+		AppMinor: 18,
+		AppPatch: 5,
 		BuildTags: []string{
 			"signrpc", "walletrpc", "chainrpc", "invoicesrpc",
 		},