Backport type fixes

Author: nicolas-grekas

CurlHttpClient.php

@@ -512,7 +512,7 @@ private static function createRedirectResolver(array $options, string $host): \C
         };
     }
 
-    private function findConstantName($opt): ?string
+    private function findConstantName(int $opt): ?string
     {
         $constants = array_filter(get_defined_constants(), static function ($v, $k) use ($opt) {
             return $v === $opt && 'C' === $k[0] && (0 === strpos($k, 'CURLOPT_') || 0 === strpos($k, 'CURLINFO_'));

Response/TraceableResponse.php

@@ -202,7 +202,7 @@ public static function stream(HttpClientInterface $client, iterable $responses,
         }
     }
 
-    private function checkStatusCode($code)
+    private function checkStatusCode(int $code)
     {
         if (500 <= $code) {
             throw new ServerException($this);

ScopingHttpClient.php

@@ -43,7 +43,7 @@ public function __construct(HttpClientInterface $client, array $defaultOptionsBy
         }
     }
 
-    public static function forBaseUri(HttpClientInterface $client, string $baseUri, array $defaultOptions = [], $regexp = null): self
+    public static function forBaseUri(HttpClientInterface $client, string $baseUri, array $defaultOptions = [], string $regexp = null): self
     {
         if (null === $regexp) {
             $regexp = preg_quote(implode('', self::resolveUrl(self::parseUrl('.'), self::parseUrl($baseUri))));