Upgrade from 1.x to 2.0
------------------------

Several changes have been made to the public API in 2.0 in order to keep
compatibility with Symfony 4.3:

- `HtmlPageCrawler::html()` is now just the parent `Crawler::html()` and acts as *getter* only.
  Setting HTML content via `HtmlPageCrawler::html($html)` is *not possible* any more,
  use `HtmlPageCrawler::setInnerHtml($html)` instead

- `HtmlPageCrawler::text()` is now just the parent `Crawler::text()` and acts as *getter* only
  that returns the text content from the *first* node only. For setting text content, use
  `HtmlPageCrawler::setText($text)` instead.
   
- new method `HtmlPageCrawler::getCombinedText()` that returns the combined text from all nodes
  (as jQuery's `text()` function does and previous versions of `HtmlPageCrawler::text()` did)

- `HtmlPageCrawler::attr()` is now just the parent `Crawler::attr()` and acts as *getter* only.
  For setting attributes use `HtmlPageCrawler::setAttribute($name, $value)` 

- removed method `HtmlPageCrawler::isDisconnected()`

__To update your code, you have to:__

- replace all calls to `$MyCrawlerInstance->html($html)` used as *setter* by `$MyCrawlerInstance->setInnerHtml($html)`
- replace all calls to `$MyCrawlerInstance->attr($name, $value)` used as *setter* by `$MyCrawlerInstance->setAttribute($name, $value)`
- replace all calls to `$MyCrawlerInstance->text($text)` used as *setter* by `$MyCrawlerInstance->setText($text)`
- replace all calls to `$MyCrawlerInstance->text()` (i.e. every call to `text()` not preceded by `first()`) by `$MyCrawlerInstance->getCombinedText()`
- replace all calls to `$MyCrawlerInstance->first()->text()` by `$MyCrawlerInstance->text()`