Fixed PHPStan issues

includes/Updates/CheckForUpgrades.php

@@ -5,7 +5,7 @@
 namespace WPGraphQL\ContentBlocks\Updates;
 
 if (! function_exists('wp_graphql_content_blocks_check_for_upgrades')) {
-	function wp_graphql_content_blocks_check_for_upgrades() {
+	function wp_graphql_content_blocks_check_for_upgrades() : void {
 		$properties = array(
 			'plugin_slug'     => 'wp-graphql-content-blocks',
 			'plugin_basename' => WPGRAPHQL_CONTENT_BLOCKS_PLUGIN_PATH,

includes/Updates/PluginUpdater.php

@@ -31,7 +31,7 @@ class PluginUpdater {
 	 * These properties are passed in when instantiating to identify the plugin and it's update location.
 	 * @var array
 	 */
-	private $properties;
+	private $properties = [];
 
 	/**
 	 * Get the class constructed.
@@ -53,7 +53,7 @@ public function __construct( $properties ) {
 
 		$this->properties = $this->get_full_plugin_properties( $properties, $this->api_url );
 
-		if ( ! $this->properties ) {
+		if ( empty($this->properties) ) {
 			return;
 		}
 
@@ -65,9 +65,9 @@ public function __construct( $properties ) {
 	 *
 	 * @param array  $properties These properties are passed in when instantiating to identify the plugin and it's update location.
 	 * @param string $api_url    The URL where the api is located.
-	 * @return array|null
+	 * @return array
 	 */
-	public function get_full_plugin_properties( $properties, $api_url ) {
+	public function get_full_plugin_properties( $properties, $api_url ) : array {
 		$plugins = \get_plugins();
 
 		// Scan through all plugins installed and find the one which matches this one in question.
@@ -86,7 +86,7 @@ public function get_full_plugin_properties( $properties, $api_url ) {
 		}
 
 		// No matching plugin was found installed.
-		return null;
+		return [];
 	}
 
 	/**
@@ -105,7 +105,7 @@ public function register() {
 	 * @param ?object $transient_value The value of the `site_transient_update_plugins` transient.
 	 *
 	 * @handles site_transient_update_plugins
-	 * @return object
+	 * @return object|null
 	 */
 	public function filter_plugin_update_transient( $transient_value ) {
 		// No update object exists. Return early.

phpstan-baseline.neon

@@ -6,8 +6,8 @@ parameters:
 			path: includes/Data/BlockAttributeResolver.php  
 
 		-
-			message: "#^Access to an undefined property object\\:\\:\\$response\\.$#"
-			count: 1
-			path: includes/PluginUpdater/UpdateCallbacks.php
+			message: '#Access to an undefined property .+#'
+			count: 18
+			path: includes/Updates/PluginUpdater.php