feat: mixins/extends/assets options

packages/runtime-core/__tests__/apiApp.spec.ts

@@ -207,6 +207,4 @@ describe('api: createApp', () => {
   })
 
   test.todo('mixin')
-
-  test.todo('config.optionsMergeStrategies')
 })

packages/runtime-core/__tests__/apiOptions.spec.ts

@@ -0,0 +1,17 @@
+describe('api: options', () => {
+  test('data', () => {})
+
+  test('computed', () => {})
+
+  test('methods', () => {})
+
+  test('watch', () => {})
+
+  test('provide/inject', () => {})
+
+  test('mixins', () => {})
+
+  test('extends', () => {})
+
+  test('lifecycle', () => {})
+})