minor symfony#25260 [Intl] Correct Typehint (votemike)

This PR was merged into the 4.0 branch.

Discussion
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[Intl] Correct Typehint

| Q             | A
| ------------- | ---
| Branch?       | 4.0
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -
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Commits
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5377e28 [Intl] Correct Typehint

Author: fabpot

src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php

@@ -257,7 +257,7 @@ class NumberFormatter
      * @throws MethodArgumentValueNotImplementedException When the $style is not supported
      * @throws MethodArgumentNotImplementedException      When the pattern value is different than null
      */
-    public function __construct(?string $locale = 'en', string $style = null, $pattern = null)
+    public function __construct(?string $locale = 'en', int $style = null, $pattern = null)
     {
         if ('en' !== $locale && null !== $locale) {
             throw new MethodArgumentValueNotImplementedException(__METHOD__, 'locale', $locale, 'Only the locale "en" is supported');