fix: phpstan level 9 errors (#25)

src/Connection/HMsg.php

@@ -10,6 +10,9 @@
 
 final class HMsg implements MessageInterface
 {
+    /**
+     * @var array<string, string|int|null>
+     */
     private array $headers;
 
     public ?string $payload;

src/Connection/NatsConnection.php

@@ -194,6 +194,7 @@ public function validatePing(): void
      */
     public function request(string $subject, string $payload = '', ?string $reply = null): MessageInterface
     {
+        /** @var string $replySubject */
         $replySubject = StringUtil::isEmpty($reply) ? self::createSid() : $reply;
 
         $sub = $this->subscribe($replySubject, null);

src/Connection/ServerInfo.php

@@ -134,7 +134,7 @@ public function getMaxPayload(): int
         return $this->maxPayload;
     }
 
-    public function getClientId(): int
+    public function getClientId(): ?int
     {
         return $this->clientId;
     }

src/Encoder/EncoderInterface.php

@@ -4,12 +4,15 @@
 
 namespace EJTJ3\PhpNats\Encoder;
 
-/**
- * @author Evert Jan Hakvoort <[email protected]>
- */
 interface EncoderInterface
 {
+    /**
+     * @param object|string|array<string, mixed> $payload
+     */
     public function encode(object|string|array $payload): string;
 
+    /**
+     * @return array<string, mixed>
+     */
     public function decode(string $payload): object|array;
 }

src/Encoder/JsonEncoder.php

@@ -17,10 +17,11 @@ public function encode(object|string|array $payload): string
     }
 
     /**
-     * @return array<string, mixed>
+     * @return array<mixed>
      */
     public function decode(string $payload): array
     {
+        // @phpstan-ignore-next-line
         return json_decode($payload, true);
     }
 }

src/Logger/NullLogger.php

@@ -9,7 +9,7 @@
 
 final class NullLogger extends AbstractLogger implements LoggerInterface
 {
-    public function log($level, $message, array $context = []): void
+    public function log($level, string|\Stringable $message, array $context = []): void
     {
     }
 }