Merge pull request #1489 from agdevbridge/patch-1

Fixes warning "a promise was created but was not returned" in more places

src/transaction.js

@@ -46,10 +46,10 @@ function Transaction(client, container, config, outerTx) {
       }
       if (result && result.then && typeof result.then === 'function') {
         result.then((val) => {
-          transactor.commit(val)
+          return transactor.commit(val)
         })
         .catch((err) => {
-          transactor.rollback(err)
+          return transactor.rollback(err)
         })
       }
       return null;