check attribute is null instead of any falsy value

src/replay/index.ts

@@ -409,7 +409,7 @@ export class Replayer {
           for (const attributeName in mutation.attributes) {
             if (typeof attributeName === 'string') {
               const value = mutation.attributes[attributeName];
-              if (value) {
+              if (value !== null) {
                 ((target as Node) as Element).setAttribute(
                   attributeName,
                   value,

typings/record/collection.d.ts

@@ -0,0 +1,4 @@
+import { removedNodeMutation } from '../types';
+export declare function deepDelete(addsSet: Set<Node>, n: Node): void;
+export declare function isParentRemoved(removes: removedNodeMutation[], n: Node): boolean;
+export declare function isParentDropped(droppedSet: Set<Node>, n: Node): boolean;