Move dict keys completions higher.

If we are in a dict this is likely way more accurate.

IPython/core/completer.py

@@ -1191,18 +1191,18 b' class IPCompleter(Completer):'
         if self.use_jedi:
             return [
                 *self.custom_matchers,
+                self.dict_key_matches,
                 self.file_matches,
                 self.magic_matches,
-                self.dict_key_matches,
             ]
         else:
             return [
                 *self.custom_matchers,
+                self.dict_key_matches,
                 self.python_matches,
                 self.file_matches,
                 self.magic_matches,
                 self.python_func_kw_matches,
-                self.dict_key_matches,
             ]
 
     def all_completions(self, text:str) -> List[str]: