Add asap behavior to remove-attr scriptlet

Related issue:
- uBlockOrigin/uAssets#9528

Author: gorhill

assets/resources/scriptlets.js

@@ -731,7 +731,7 @@
             }
         }
         if ( skip ) { return; }
-        timer = self.requestIdleCallback(rmattr, { timeout: 67 });
+        timer = self.requestIdleCallback(rmattr, { timeout: 17 });
     };
     const start = ( ) => {
         rmattr();
@@ -746,10 +746,10 @@
     };
     if ( document.readyState !== 'complete' && /\bcomplete\b/.test(behavior) ) {
         self.addEventListener('load', start, { once: true });
-    } else if ( document.readyState === 'loading' ) {
-        self.addEventListener('DOMContentLoaded', start, { once: true });
-    } else {
+    } else if ( document.readyState !== 'loading' || /\basap\b/.test(behavior) ) {
         start();
+    } else {
+        self.addEventListener('DOMContentLoaded', start, { once: true });
     }
 })();
 
@@ -1511,7 +1511,6 @@
 
 
 
-
 // These lines below are skipped by the resource parser.
 // <<<< end of private namespace
 })();