Fix psalm issues.

.phive/phars.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phive xmlns="https://phar.io/phive">
   <phar name="phpstan" version="1.10.14" installed="1.10.14" location="./tools/phpstan" copy="false"/>
-  <phar name="psalm" version="5.10.0" installed="5.10.0" location="./tools/psalm" copy="false"/>
+  <phar name="psalm" version="5.13.0" installed="5.13.0" location="./tools/psalm" copy="false"/>
 </phive>

psalm.xml

@@ -48,5 +48,6 @@
         <RedundantPropertyInitializationCheck errorLevel="suppress"/>
         <RedundantCast errorLevel="suppress"/>
         <UndefinedAttributeClass errorLevel="suppress"/>
+        <UnsupportedPropertyReferenceUsage errorLevel="suppress"/>
     </issueHandlers>
 </psalm>