Cast event to an array when reading

Fixes #31

Author: thekid

ChangeLog.md

@@ -3,6 +3,9 @@ AWS Lambda change log
 
 ## ?.?.? / ????-??-??
 
+* Fixed issze #31: Event is not always an array (when using JSON library
+  6.0+, see https://github.com/xp-forge/json/pull/18
+  (@thekid)
 * Fixed issue #29: Implicitly marking parameter as nullable is deprecated
   (@thekid)
 

src/main/php/xp/lambda/AwsRunner.class.php

@@ -62,7 +62,7 @@ public static function main($args) {
       try {
         $r= $api->receive('invocation/next');
         $context= new Context($r->headers(), $variables);
-        $event= 0 === $context->payloadLength ? null : Json::read(new StreamInput($r->in()));
+        $event= 0 === $context->payloadLength ? null : (array)Json::read(new StreamInput($r->in()));
 
         $lambda->invoke($event, $context);
       } catch (Throwable $t) {