Added new onPageHeaders() event

CHANGELOG.md

@@ -1,3 +1,9 @@
+# v1.7.37
+## mm/dd/2022
+
+1. [](#new)
+    * Added new `onPageHeaders()` event to allow for header modification as needed
+
 # v1.7.36
 ## 09/08/2022
 

system/src/Grav/Common/Page/Page.php

@@ -622,7 +622,12 @@ class Page implements PageInterface
             $headers['Vary'] = 'Accept-Encoding';
         }
 
-        return $headers;
+
+        // Added new Headers event
+        $headers_obj = (object) $headers;
+        Grav::instance()->fireEvent('onPageHeaders', new Event(['headers' => $headers_obj]));
+
+        return (array)$headers_obj;
     }
 
     /**