Fix memory leaks in LspEndpoint

pylspclient/lsp_endpoint.py

@@ -88,11 +88,14 @@ class LspEndpoint(threading.Thread):
         self.next_id += 1
         cond = threading.Condition()
         self.event_dict[current_id] = cond
+
         cond.acquire()
         self.send_message(method_name, kwargs, current_id)
         cond.wait()
         cond.release()
-        result, error = self.response_dict[current_id]
+
+        self.event_dict.pop(current_id)
+        result, error = self.response_dict.pop(current_id)
         if error:
             raise lsp_structs.ResponseError(error.get("code"), error.get("message"), error.get("data"))
         return result