Fix types in map_syncer_test and pin mypy version

Pinning mypy version might be good idea to avoid spurious type
checking issues when pushing unrelated changes.

tools/map_syncer/map_syncer_test.py

@@ -322,7 +322,8 @@ def test_sync_files_deletes_only_old(live_maps_url: str, fs: FakeFilesystem) ->
     assert fs.exists(d / "map_old_1.sd7")
     assert not fs.exists(d / "map_old_2.sd7")
     assert cast(
-        Dict[str, int], json.loads(fs.get_object(d / "tombstones.json").contents)
+        Dict[str, int],
+        json.loads(fs.get_object(d / "tombstones.json").contents or "{}"),
     ) == {
         "map_old_1.sd7": initial_tombstones["map_old_1.sd7"],
     }

tools/map_syncer/requirements.txt

@@ -1,11 +1,11 @@
-black>=23.3.0
+black>=23.11.0
 isort>=5.12.0
-mypy>=1.4.1
+mypy==1.7.1
 paho-mqtt>=1.6.1
-pyfakefs>=5.2.2
+pyfakefs>=5.3.1
 pytest-httpserver>=1.0.8
-pytest-mock>=3.11.1
-pytest-mqtt>=0.2.0
-pytest>=7.4.0
-ruff>=0.0.277
-types-paho-mqtt>=1.6.0.6
+pytest-mock>=3.12.0
+pytest-mqtt>=0.3.1
+pytest>=7.4.3
+ruff>=0.1.6
+types-paho-mqtt>=1.6.0.7