Template params can only have one argument

The fact that a promise can also be rejected with a Throwable and/or Exception is implied and there is no need to also define that here.

Refs: reactphp/promise#223

Author: WyriHaximus

src/Query/ExecutorInterface.php

@@ -36,7 +36,7 @@ interface ExecutorInterface
      * ```
      *
      * @param Query $query
-     * @return \React\Promise\PromiseInterface<\React\Dns\Model\Message,\Exception>
+     * @return \React\Promise\PromiseInterface<\React\Dns\Model\Message>
      *     resolves with response message on success or rejects with an Exception on error
      */
     public function query(Query $query);

src/Resolver/ResolverInterface.php

@@ -39,7 +39,7 @@ interface ResolverInterface
      * ```
      *
      * @param string $domain
-     * @return \React\Promise\PromiseInterface<string,\Exception>
+     * @return \React\Promise\PromiseInterface<string>
      *     resolves with a single IP address on success or rejects with an Exception on error.
      */
     public function resolve($domain);
@@ -87,7 +87,7 @@ public function resolve($domain);
      * ```
      *
      * @param string $domain
-     * @return \React\Promise\PromiseInterface<array,\Exception>
+     * @return \React\Promise\PromiseInterface<array>
      *     Resolves with all record values on success or rejects with an Exception on error.
      */
     public function resolveAll($domain, $type);