add /pairlists to rest client

scripts/rest_client.py

@@ -313,6 +313,13 @@ class FtRestClient():
         """
         return self._get(f"strategy/{strategy}")
 
+    def pairlists(self):
+        """Lists available pairlists
+
+        :return: json object
+        """
+        return self._get("pairlists")
+
     def plot_config(self):
         """Return plot configuration if the strategy defines one.