Setting PHP Version in psalm

Psalm is being tested with 8.3, but when infers the PHP version from the
package.json it uses 7.1 package can user new langauge features but
Psalm will throw errors when this happens.

Setting the php version resolve the errors from beenig thrown.

psalm.xml

@@ -7,6 +7,7 @@
     xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
 	findUnusedBaselineEntry="true"
 	findUnusedCode="false"
+	phpVersion="8.3"
 >
     <projectFiles>
         <directory name="src/" />

src/analyzer/Config/YamlConfigProvider.php

@@ -8,6 +8,11 @@
 use Scheb\Tombstone\Core\PathNormalizer;
 use Symfony\Component\Yaml\Yaml;
 
+/**
+ * @psalm-type SourceConfig array{root_directory: string}
+ * @psalm-type LogConfig array{directory: string, custom: array{file: string}}
+ * @psalm-type ReportConfig array{php: string, checkstyle: string, html: string}
+ */
 class YamlConfigProvider implements ConfigProviderInterface
 {
     /**
@@ -30,6 +35,9 @@ public function __construct(string $configFile)
 
     public function readConfiguration(): array
     {
+        /**
+         * @var array{source_code: SourceConfig, logs: LogConfig, report: ReportConfig}  $config
+         */
         $config = Yaml::parseFile($this->configFile);
 
         if (isset($config['source_code']['root_directory'])) {