Forgot to ad dmethod in previous commit

kitty/key_encoding.py

@@ -239,6 +239,10 @@ class KeyEvent(NamedTuple):
             return self.text == text
         return self.text.lower() == text.lower()
 
+    @property
+    def is_release(self) -> bool:
+        return self.type is EventType.RELEASE
+
     @property
     def mods_without_locks(self) -> int:
         return self.mods & ~(NUM_LOCK | CAPS_LOCK)