fix(reactivity): effect should handle self dependency mutations

packages/reactivity/__tests__/effect.spec.ts

@@ -6,7 +6,8 @@ import {
   TrackOpTypes,
   TriggerOpTypes,
   DebuggerEvent,
-  markNonReactive
+  markNonReactive,
+  ref
 } from '../src/index'
 import { ITERATE_KEY } from '../src/effect'
 
@@ -735,4 +736,14 @@ describe('reactivity/effect', () => {
     obj.foo = NaN
     expect(fnSpy).toHaveBeenCalledTimes(1)
   })
+
+  it('should handle self dependency mutations', () => {
+    const count = ref(0)
+    effect(() => {
+      count.value++
+    })
+    expect(count.value).toBe(1)
+    count.value = 10
+    expect(count.value).toBe(11)
+  })
 })