Add void test script

Author: paul-go

package.json

@@ -19,6 +19,7 @@
 		"build/moduless-electron.js"
 	],
 	"scripts": {
+		"test" : "echo \"Error: no test specified\" && exit 1",
 		"publish": "np",
 		"build-example": "cd example && tsc --build"
 	},