fix(utils): resolve when returned null

Signed-off-by: Tobias Gurtzick <[email protected]>

Author: wzrdtales

lib/temputils.js

@@ -29,7 +29,7 @@ function maybePromised (context, action, params) {
     params[params.length++] = r;
 
     if (typeof action === 'function') action = action.apply(context, params);
-    else action = Promise.resolve();
+    if (action === null) action = Promise.resolve();
 
     if (isPromise(action)) {
       action