fix(overmind): proxyify effects bug

Author: christianalfoni

packages/node_modules/overmind/src/config/statechart.test.ts

@@ -283,7 +283,7 @@ describe('Statecharts', () => {
     })).toEqual(true)
   })
 
-  test.only('should allow nesting', () => {
+  test('should allow nesting', () => {
     const fooEntry: Action = ({ state }) => {
       state.transitions.push('fooEntry')
     }

packages/node_modules/overmind/src/proxyfyEffects.ts

@@ -12,6 +12,10 @@ export function proxifyEffects<Effects>(
   cb: (effect) => void,
   path: string = ''
 ): Effects {
+  if (!isObject(effects) && !(typeof effects === 'function')) {
+    return effects
+  }
+  
   return new Proxy(effects as any, {
     apply(target, thisArg, agumentsList) {
       const effectId = currentEffectId++