remove extends object and fix props

Author: pikax

src/mount.ts

@@ -34,7 +34,7 @@ import { stubComponents } from './stubs'
 
 type Slot = VNode | string | { render: Function }
 
-interface MountingOptions<Props, Data extends object = {}> {
+interface MountingOptions<Props, Data = {}> {
   data?: () => Data extends unknown ? never : Data
   props?: Props
   attrs?: Record<string, unknown>
@@ -102,7 +102,7 @@ export function mount<
     E,
     EE
   >,
-  options?: MountingOptions<Props, D>
+  options?: MountingOptions<never, D>
 ): VueWrapper<
   ComponentPublicInstance<Props, RawBindings, D, C, M, E, VNodeProps & Props>
 >

test-dts/mount.d-test.ts

@@ -116,9 +116,9 @@ const AppWithoutProps = {
 
 // can't receive extra props
 expectError(
-  (wrapper = mount(AppWithoutProps, {
+  mount(AppWithoutProps, {
     props: { b: 'Hello' }
-  }))
+  })
 )
 
 // except if explicitly cast