bug symfony#59769 Enable JSON_PRESERVE_ZERO_FRACTION in jsonRequest method (raffaelecarelle)

This PR was submitted for the 7.2 branch but it was squashed and merged into the 6.4 branch instead.

Discussion
----------

Enable `JSON_PRESERVE_ZERO_FRACTION` in `jsonRequest` method

| Q             | A
| ------------- | ---
| Branch?       | 7.2
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Issues        |
| License       | MIT

Updated the jsonRequest method to use JSON_PRESERVE_ZERO_FRACTION when encoding parameters.
This avoid unintended cast to int.

Test case:

```
$this->browser->jsonRequest('GET', 'url', ['cost' => 10.0]);
```

"cost" will be cast to int `10`

Commits
-------

535953e Enable `JSON_PRESERVE_ZERO_FRACTION` in `jsonRequest` method

Author: fabpot

src/Symfony/Component/BrowserKit/AbstractBrowser.php

@@ -170,7 +170,7 @@ public function xmlHttpRequest(string $method, string $uri, array $parameters =
      */
     public function jsonRequest(string $method, string $uri, array $parameters = [], array $server = [], bool $changeHistory = true): Crawler
     {
-        $content = json_encode($parameters);
+        $content = json_encode($parameters, \JSON_PRESERVE_ZERO_FRACTION);
 
         $this->setServerParameter('CONTENT_TYPE', 'application/json');
         $this->setServerParameter('HTTP_ACCEPT', 'application/json');

src/Symfony/Component/BrowserKit/Tests/AbstractBrowserTest.php

@@ -67,12 +67,12 @@ public function testXmlHttpRequest()
     public function testJsonRequest()
     {
         $client = $this->getBrowser();
-        $client->jsonRequest('GET', 'http://example.com/', ['param' => 1], [], true);
+        $client->jsonRequest('GET', 'http://example.com/', ['param' => 1, 'float' => 10.0], [], true);
         $this->assertSame('application/json', $client->getRequest()->getServer()['CONTENT_TYPE']);
         $this->assertSame('application/json', $client->getRequest()->getServer()['HTTP_ACCEPT']);
         $this->assertFalse($client->getServerParameter('CONTENT_TYPE', false));
         $this->assertFalse($client->getServerParameter('HTTP_ACCEPT', false));
-        $this->assertSame('{"param":1}', $client->getRequest()->getContent());
+        $this->assertSame('{"param":1,"float":10.0}', $client->getRequest()->getContent());
     }
 
     public function testGetRequestWithIpAsHttpHost()