contrib: sync-places: convert tags into strings

When settings tags from the command line, key, value pairs are always
strings. Make sure this is the same when reading a YAML file. It can
easily be done in the YAML file itself, but this makes the syntax a bit
lighter.

Signed-off-by: Liam Beguin <liambeguin@gmail.com>

contrib/sync-places.py

@@ -110,6 +110,13 @@ async def do_sync(session, args):
                     changed = True
 
             tags = config["places"][name].get("tags", {}).copy()
+            for k, v in tags.items():
+                if not isinstance(k, str):
+                    tags[str(k)] = v
+                    del(tags[k])
+                if not isinstance(v, str):
+                    tags[k] = str(v)
+
             if place_tags != tags:
                 print(
                     "Setting tags for place %s to %s"