fix(overmind): fix iteration of sub actions, verify function

Author: christianalfoni

packages/node_modules/overmind/src/index.ts

@@ -350,9 +350,14 @@ export class Overmind<Config extends Configuration> implements BaseApp {
       return Object.assign(aggr, {
         [name]: Object.keys(actions[name] || {}).reduce(
           (aggr, subName) =>
-            Object.assign(aggr, {
-              [subName]: actions[name][subName](operators),
-            }),
+            Object.assign(
+              aggr,
+              typeof actions[name][subName] === 'function'
+                ? {
+                    [subName]: actions[name][subName](operators),
+                  }
+                : {}
+            ),
           {}
         ),
       })