feat(useLazyQuery): load returns Promise, fix #1486

packages/docs/src/api/use-lazy-query.md

@@ -4,14 +4,23 @@ Extends [useQuery](./use-query.md)
 
 ## Additional Return
 
-- `load(document?, variables?, options?)`: function to start querying. Returns `true` if it is the first time the query is called, `false` otherwise.
+- `load(document?, variables?, options?)`: function to start querying. Returns `Promise<Result>` if it is the first time the query is called, `false` otherwise.
 
     Example:
 
     ```js
     const { load, refetch } = useLazyQuery(query, variables, options)
 
-    function fetchMyData () {
+    function fetchOrRefetch () {
       load() || refetch()
     }
+
+    function waitForLoad () {
+      try {
+        const result = await load()
+        // do something with result
+      } catch (error) {
+        // handle error
+      }
+    }
     ```