Fix most of types

pyproject.toml

@@ -11,6 +11,7 @@ dependencies = [
     "megasniff>=0.2.0",
     "breakshaft>=0.1.0",
     "case-insensitive-dictionary>=0.2.1",
+    "mypy>=1.17.0",
 ]
 
 [tool.uv.sources]
@@ -37,7 +38,7 @@ dev = [
     { "include-group" = "all_containers" },
 ]
 
-xml = ["lxml>=6.0.0", ]
+xml = ["lxml>=6.0.0", "lxml-stubs>=0.5.1"]
 msgpack = ["msgpack>=1.1.1", ]
 json = ["orjson>=3.11.0", ]