Fix mypy errors

Author: AA-Turner

sphinxcontrib/htmlhelp/__init__.py

@@ -11,6 +11,7 @@
 import html
 import os
 from os import path
+from pathlib import Path
 from typing import Any, Dict, List, Set, Tuple, Type
 
 from docutils import nodes
@@ -267,7 +268,7 @@ def build_toc_file(self) -> None:
             }
             f.write(self.render('project.hhc', context))
 
-    def build_hhx(self, outdir: str, outname: str) -> None:
+    def build_hhx(self, outdir: Path, outname: str) -> None:
         logger.info(__('writing index file...'))
         index = IndexEntries(self.env).create_index(self)
         filename = path.join(outdir, outname + '.hhk')

tox.ini

@@ -42,4 +42,4 @@ description =
 extras =
     lint
 commands=
-    mypy sphinxcontrib/
+    mypy sphinxcontrib/ --explicit-package-bases