Implement '==' and '!=' for ynbool

'ynbool(True) == "yes"', 'ynbool(True) == True' and 'ynbool(True) == ynbool(True)' were not working.

Author: Frechdachs

mpv.py

@@ -259,6 +259,9 @@ def __str__(self):
     def __repr__(self):
         return str(self.val)
 
+    def __eq__(self, other):
+        return str(self) == other or bool(self) == other
+
 def _ensure_encoding(possibly_bytes):
     return possibly_bytes.decode() if type(possibly_bytes) is bytes else possibly_bytes