completions to use new Jedi get_names method (#15791)

* completions to use new Jedi get_names method

jedi.api.names has been deprecated, use new syntax instead.
* note I could have used the Script object initialized in the lines right below the change, but I went the safe route since the method enclosing the change returns pre-emptively

* Create 15791.md

* Update news/2 Fixes/15791.md

Co-authored-by: Karthik Nadig <[email protected]>

Co-authored-by: Karthik Nadig <[email protected]>

Author: moselhy

news/2 Fixes/15791.md

@@ -0,0 +1,2 @@
+In completions.py: jedi.api.names has been deprecated, switch to new syntax.
+(thanks [moselhy](https://github.com/moselhy)).

pythonFiles/completion.py

@@ -581,11 +581,9 @@ def _process_request(self, request):
 
         if lookup == "names":
             return self._serialize_definitions(
-                jedi.api.names(
-                    source=request.get("source", None),
-                    path=request.get("path", ""),
-                    all_scopes=True,
-                ),
+                jedi.Script(
+                    source=request.get("source", None), path=request.get("path", "")
+                ).get_names(all_scopes=True),
                 request["id"],
             )