add node consumer tests to travis

tests/node/consumers/cjs-consumer.js

@@ -0,0 +1,29 @@
+/**
+ * Tests to ensure that a consuming app can use CJS require
+ *
+ * @author d98762625 [d98762625@gmail.com]
+ * @copyright Crown Copyright 2019
+ * @license Apache-2.0
+ */
+
+const chef = require("cyberchef");
+const assert = require("assert");
+
+const d = chef.bake("Testing, 1 2 3", [
+    chef.toHex,
+    chef.reverse,
+    {
+        op: chef.unique,
+        args: {
+            delimiter: "Space",
+        }
+    },
+    {
+        op: chef.multiply,
+        args: {
+            delimiter: "Space",
+        }
+    }
+]);
+
+assert.equal(d.value, "630957449041920");