add null coalescing

Author: kevindees

src/Core/System.php

@@ -530,7 +530,7 @@ public function health($info) : array
 
         try {
             $core_version = InstalledVersions::getVersion('typerocket/core');
-        } catch (\Throwable $e) {
+        } catch (\Throwable) {
             $core_version = __('Another plugin is blocking this information.', 'typerocket-core');
         }
 

src/Elements/Fields/Matrix.php

@@ -359,7 +359,7 @@ public static function componentTemplate($component, $group, $classes = '')
         }
 
         $controls_html = array_reduce($group_control_list, function($carry, $item) {
-            $el = isset($item[0]) ? $item[0] : 'a';
+            $el = $item[0] ?? 'a';
             unset($item[0]);
             return $carry . Html::el( $el, $item);
         });

src/Elements/Fields/Repeater.php

@@ -108,7 +108,7 @@ public function getString()
         }
 
         $controls_html = array_reduce($group_control_list, function($carry, $item) {
-            $el = isset($item[0]) ? $item[0] : 'a';
+            $el = $item[0] ?? 'a';
             unset($item[0]);
             return $carry . Html::el( $el, $item);
         });