startWaiting with useEffect hook overrides waiters array

使用一个 useEffect 中的两个 startWaiting 调用重现该问题，然后将得到的 waiters 数组与分开的 Component1 和 Component2 示例进行比较。检查仓库中 startWaiting 和 waiter 状态的入口点；当 'first' 和 'second' 这两个 waiter 都能一直保留到各自对应的 endWaiting 调用时，即表示完成。

Hi there!
Thank you for this awesome library.
I experienced a kind of weird behavior while working with this library.

Description
if I use method startWaiting in useEffect hook like

useEffect(() => {
   startWaiting('first');
   startWaiting('second');
}, []); 

Result
waiters array contains only 'second' waiter, so waiters array is overwritten.

the same issue would be in the example below:

component1:

const Component1 = () => {

 useEffect(() => {
     const fetchData = async () => {
         startWaiting('first');
         const response = await apiCall();
         endWaiting('first');
     }
     fetchData();
 }, []);

return (/*react markup and Wait component inside*/);

component2:

const Component2 = () => {

 useEffect(() => {
     const fetchData = async () => {
         startWaiting('second');
         const response = await anotherApiCall();
         endWaiting('second');
     }
     fetchData(); 
 }, []);

return (/*react markup and Wait component inside*/);

component3:

const Component3 = () => 
(
<Waiter>
   <Component1 />
   <Component2 />
</Waiter>
);

in this case, every time I am trying to receive waiters array it will contain only 'second'.