my_fingerprint: public_bundle.serialize isn't awaitable

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>

ChangeLog

@@ -4,6 +4,7 @@ xxxx-xx-xx Maxime “pep” Buquet <pep@bouah.net>
     - get_devices and get_active_devices now return Iterable[int] instead of Iterable[str]
   * Changes:
     - fetch_bundle and fetch_device methods are now public
+    - my_fingerprint doesn't traceback anymore on normal operation
   * Added:
     - New fetch_bundles method to fetch all bundles at once
 Version 0.7.0:

slixmpp_omemo/__init__.py

@@ -299,7 +299,7 @@ class XEP_0384(BasePlugin):
         return self._device_id
 
     async def my_fingerprint(self) -> str:
-        bundle = await self._omemo().public_bundle.serialize(self.omemo_backend)
+        bundle = self._omemo().public_bundle.serialize(self.omemo_backend)
         return fp_from_ik(bundle['ik'])
 
     def _set_node_config(