fix(types): allow false as a component stub value (#1231)

Author: garyo

packages/server-test-utils/types/index.d.ts

@@ -10,7 +10,7 @@ type VueClass<V extends Vue> = (new (...args: any[]) => V) & typeof Vue
  * If it is an array of string, the specified children are replaced by blank components
  */
 type Stubs = {
-  [key: string]: Component | string | true
+  [key: string]: Component | string | boolean
 } | string[]
 
 /**

packages/test-utils/types/index.d.ts

@@ -22,7 +22,7 @@ type Slots = {
  * If it is an array of string, the specified children are replaced by blank components
  */
 type Stubs = {
-  [key: string]: Component | string | true
+  [key: string]: Component | string | boolean
 } | string[]
 
 /**