chore: fix tests

Author: yyx990803

packages/runtime-core/__tests__/components/__snapshots__/Portal.spec.ts.snap

@@ -1,7 +1,5 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`renderer: portal should remove children when unmounted 1`] = `"<div>teleported</div>"`;
-
 exports[`renderer: portal should update children 1`] = `"<div>teleported</div>"`;
 
 exports[`renderer: portal should update children 2`] = `""`;

packages/runtime-core/__tests__/helpers/resolveAssets.spec.ts

@@ -19,10 +19,10 @@ describe('resolveAssets', () => {
     const FooBar = () => null
     const BarBaz = { mounted: () => null }
 
-    let component1: Component
-    let component2: Component
-    let component3: Component
-    let component4: Component
+    let component1: Component | string
+    let component2: Component | string
+    let component3: Component | string
+    let component4: Component | string
     let directive1: Directive
     let directive2: Directive
     let directive3: Directive