Added extra test for output when request has no keys

refs https://github.com/TryGhost/Toolbox/issues/292

- Providing extra coverage so the outputs are clear

ghost/extract-api-key/test/extract-api-key.test.js

@@ -2,6 +2,17 @@ const assert = require('assert');
 const extractApiKey = require('../index');
 
 describe('Extract API Key', function () {
+    it('returns nulls for a request without any key', function () {
+        const {key, type} = extractApiKey({
+            query: {
+                filter: 'status:active'
+            }
+        });
+
+        assert.equal(key, null);
+        assert.equal(type, null);
+    });
+
     it('Extracts Content API key from the request', function () {
         const {key, type} = extractApiKey({
             query: {