| ⇢ | A | UrlCollection added |
| ⇢ | A | Crawler::addRejectedUrl() added | |
| ⇢ | A | UrlCollection::push() added | |
| ⇢ | A | UrlCollection::pop() added | |
| ⇢ | A | UrlCollection::toArray() added | |
| ⇢ | A | UrlCollection::contains() added | |
| ⇢ | A | UrlCollection::count() added | |
| ⇢ | A | UrlCollection::reset() added | |
| B | ↗ | A | Crawler::shouldCrawlUrl() improved |
| A | ↛ | Crawler::addUrlToQueue() removed | |
| A | ↛ | Crawler::isUrlRejected() removed | |
| A | ↛ | Crawler::isUrlCrawled() removed | |
| A | ↛ | Crawler::isUrlQueued() removed |