Update docs workflow to only trigger on docs changes and update type …

…hint for python3.8 compatibility

.github/workflows/docs.yml

@@ -4,6 +4,9 @@ on:
   push:
     branches:
       - main
+    paths:
+      - docs/**
+      - mkdocs.yml
 
 jobs:
   deploy:

pyproject.toml

@@ -76,3 +76,4 @@ line-ending = "auto"
 [tool.mypy]
 strict = false
 ignore_missing_imports = true
+python_version = "3.8"

scrapy_webarchive/wacz.py

@@ -3,7 +3,7 @@
 import os
 import zipfile
 from collections import defaultdict
-from typing import IO, Generator, List, Union
+from typing import IO, Generator, List, Union, Dict
 
 from warc import WARCReader as BaseWARCReader
 from warc.warc import WARCRecord
@@ -134,7 +134,7 @@ def _get_index(wacz_file: zipfile.ZipFile) -> Union[gzip.GzipFile, IO]:
 
         raise FileNotFoundError("No valid index file found.")
 
-    def _parse_index(self, index_file: Union[gzip.GzipFile, IO]) -> dict[str, List[CdxjRecord]]:
+    def _parse_index(self, index_file: Union[gzip.GzipFile, IO]) -> Dict[str, List[CdxjRecord]]:
         cdxj_records = defaultdict(list)
 
         for line in index_file: