Add in valid Chatfuel tag

src/validateFacebookTags.js

@@ -1,12 +1,18 @@
 // https://developers.facebook.com/docs/messenger-platform/send-messages/message-tags
 
+const validChatfuelTags = [
+    'UPDATE',
+];
+
 const validFacebookTags = [
     'CONFIRMED_EVENT_UPDATE',
     'POST_PURCHASE_UPDATE',
     'ACCOUNT_UPDATE',
     'HUMAN_AGENT',
 ];
 
-const validateFacebookTags = (tag) => validFacebookTags.includes(tag);
+const allValidTags = [...validFacebookTags, ...validChatfuelTags];
+
+const validateFacebookTags = (tag) => allValidTags.includes(tag);
 
 export default validateFacebookTags;

test/unit/validateFacebookTags.test.js

@@ -12,10 +12,11 @@ describe('Validate Facebook tags', () => {
     });
 
     it('should be false if valid tag has incorrect case', () => {
-        expect(validateFacebookTags('business_productivity')).to.be.false;
+        expect(validateFacebookTags('update')).to.be.false;
     });
 
     [
+        'UPDATE',
         'CONFIRMED_EVENT_UPDATE',
         'POST_PURCHASE_UPDATE',
         'ACCOUNT_UPDATE',