Extend Psalm type for parameters (#42)

src/CategorySource.php

@@ -47,6 +47,8 @@ public function getMessage(string $id, string $locale, array $parameters = []):
      *
      * @param string $message Message to be formatted.
      * @param array $parameters Parameters to use.
+     * @psalm-param array<array-key, mixed> $parameters
+     *
      * @param string $locale Locale to use. Usually affects formatting numbers, dates etc.
      *
      * @return string Formatted message.

src/MessageFormatterInterface.php

@@ -14,6 +14,8 @@ interface MessageFormatterInterface
      *
      * @param string $message A message to format.
      * @param array $parameters Parameters to replace in the message in `['name1' => 'value1', 'name2' => 'value2']` format.
+     * @psalm-param array<array-key, mixed> $parameters
+     *
      * @param string $locale Locale to use when formatting. Usually affects formatting numbers, dates etc.
      *
      * @return string Formatted message.

src/Translator.php

@@ -88,6 +88,7 @@ public function translate(
         return $this->translateUsingCategorySources($id, $parameters, $category, $locale);
     }
 
+    /** @psalm-param array<array-key, mixed> $parameters */
     private function translateUsingCategorySources(
         string $id,
         array $parameters,

src/TranslatorInterface.php

@@ -36,6 +36,8 @@ public function getLocale(): string;
      *
      * @param string $id The ID of the message to be translated. It can be either artificial ID or the source message.
      * @param array  $parameters An array of parameters for the message.
+     * @psalm-param array<array-key, mixed> $parameters
+     *
      * @param string|null $category The message category. Null means default category.
      * @param string|null $locale The target locale. Null means default locale.
      *