Update other dependencies & test files

Author: iansan5653

.devcontainer/devcontainer.json

@@ -7,7 +7,7 @@
 		// Update 'VARIANT' to pick a Node version: 16, 14, 12.
 		// Append -bullseye or -buster to pin to an OS version.
 		// Use -bullseye variants on local arm64/Apple Silicon.
-		"args": { "VARIANT": "16" }
+		"args": { "VARIANT": "20" }
 	},
 
 	// Set *default* container specific settings.json values on container create.