Psalm: suppress two notices

The current version of Psalm flags the following issues:
```
ERROR: InvalidReturnType - src\Utils.php:44:16 - The declared return type 'array<array-key, string>' for phpDocumentor\Reflection\Utils::pregSplit is incorrect, got 'list<list<int|string>|string>' (see https://psalm.dev/011)
     * @return string[] Returns an array containing substrings of subject split along boundaries matched by pattern

ERROR: InvalidReturnStatement - src\Utils.php:55:16 - The inferred type 'list<list<int|string>|string>' does not match the declared return type 'array<array-key, string>' for phpDocumentor\Reflection\Utils::pregSplit (see https://psalm.dev/128)
        return $parts;
```

I'm suggest ignoring this as `list` isn't an officially supported type.

Author: jrfnl

psalm.xml

@@ -41,5 +41,17 @@
                 <directory name="src/DocBlock/Tags/"/>
             </errorLevel>
         </RedundantConditionGivenDocblockType>
+
+        <InvalidReturnType>
+            <errorLevel type="info">
+                <file name="src/Utils.php"/>
+            </errorLevel>
+        </InvalidReturnType>
+
+        <InvalidReturnStatement>
+            <errorLevel type="info">
+                <file name="src/Utils.php"/>
+            </errorLevel>
+        </InvalidReturnStatement>
     </issueHandlers>
 </psalm>