Fix null check in deep equal algorithm (#4392)

src/util/areDeepEqual.ts

@@ -5,7 +5,8 @@ export function areDeepEqual<T extends any>(value1: T, value2: T): boolean {
     return false;
   }
 
-  if (type1 !== 'object') {
+  // eslint-disable-next-line no-null/no-null
+  if (type1 !== 'object' || value1 === null || value2 === null) {
     return value1 === value2;
   }