Updating js plugins

public/plugins/mustache/test/module-systems/commonjs-test.js

@@ -0,0 +1,12 @@
+const assert = require('assert');
+const mustache = require('mustache');
+
+const view = {
+  title: 'Joe',
+  calc: () => 2 + 4
+};
+
+assert.strictEqual(
+  mustache.render('{{title}} spends {{calc}}', view),
+  'Joe spends 6'
+);