Fix bad equality imports

Author: markerikson

src/hooks/useSyncExternalStoreWithSelector.ts

@@ -1,5 +1,5 @@
 import * as React from 'react'
-import is from '../utils/shallowEqual'
+import { is } from '../utils/shallowEqual'
 import { useSyncExternalStore } from 'react'
 
 // Intentionally not using named imports because Rollup uses dynamic dispatch

src/utils/shallowEqual.ts

@@ -1,4 +1,4 @@
-function is(x: unknown, y: unknown) {
+export function is(x: unknown, y: unknown) {
   if (x === y) {
     return x !== 0 || y !== 0 || 1 / x === 1 / y
   } else {

test/hooks/useSelector.spec.tsx

@@ -443,7 +443,7 @@ describe('React', () => {
           expect(renderedItems.length).toEqual(2)
         })
 
-        it.only('only calls selectors if the state they depend on has changed', () => {
+        it('only calls selectors if the state they depend on has changed', () => {
           const sliceA = createSlice({
             name: 'a',
             initialState: 0,