feat(useQueries): v4 api to take an object as input (#3071)

* feat(useQueries): update API to use object syntax

New v4 API - instead of taking an array of queries, `useQueries` now accepts an object with a `queries` key. The value of this key is an array of queries (this array is unchanged from v3).

* test(useQueries): update tests for new API

* docs(useQueries): update docs for v4 API

docs/src/pages/guides/migrating-to-react-query-4.md

@@ -207,6 +207,16 @@ new QueryClient({
 })
 ```
 
+### new API for `useQueries`
+
+The `useQueries` hook now accepts an object with a `queries` prop as its input. The value of the `queries` prop is an array of queries (this array is identical to what was passed into `useQueries` in v3).
+
+```diff
+- useQueries([{ queryKey1, queryFn1, options1 }, { queryKey2, queryFn2, options2 }])
++ useQueries({ queries: [{ queryKey1, queryFn1, options1 }, { queryKey2, queryFn2, options2 }] })
+```
+
+
 ### Removed undocumented methods from the `queryClient`
 
 The methods `cancelMutatations` and `executeMutation` were undocumented and unused internally, so we removed them. Since they were just wrappers around methods available on the `mutationCache`, you can still use the functionality.

docs/src/pages/guides/parallel-queries.md

@@ -25,17 +25,17 @@ function App () {
 
 If the number of queries you need to execute is changing from render to render, you cannot use manual querying since that would violate the rules of hooks. Instead, React Query provides a `useQueries` hook, which you can use to dynamically execute as many queries in parallel as you'd like.
 
-`useQueries` accepts an **array of query options objects** and returns an **array of query results**:
+`useQueries` accepts an **options object** with a **queries key** whose value is an **array of query objects**. It returns an **array of query results**:
 
 ```js
 function App({ users }) {
-  const userQueries = useQueries(
-    users.map(user => {
+  const userQueries = useQueries({
+    queries: users.map(user => {
       return {
         queryKey: ['user', user.id],
         queryFn: () => fetchUserById(user.id),
       }
     })
-  )
+  })
 }
 ```

docs/src/pages/reference/useQueries.md

@@ -6,15 +6,17 @@ title: useQueries
 The `useQueries` hook can be used to fetch a variable number of queries:
 
 ```js
-const results = useQueries([
-  { queryKey: ['post', 1], queryFn: fetchPost },
-  { queryKey: ['post', 2], queryFn: fetchPost },
-])
+const results = useQueries({
+  queries: [
+    { queryKey: ['post', 1], queryFn: fetchPost },
+    { queryKey: ['post', 2], queryFn: fetchPost }
+  ]
+})
 ```
 
 **Options**
 
-The `useQueries` hook accepts an array with query option objects identical to the [`useQuery` hook](/reference/useQuery).
+The `useQueries` hook accepts an options object with a **queries** key whose value is an array with query option objects identical to the [`useQuery` hook](/reference/useQuery).
 
 **Returns**