Pin dependency packages

lastversion/ProjectHolder.py

@@ -4,7 +4,6 @@
 import os
 import platform
 import re
-import io
 import requests
 from appdirs import user_cache_dir
 from cachecontrol import CacheControlAdapter
@@ -108,7 +107,7 @@ def get_name_cache(self):
         if not os.path.exists(self.names_cache_filename):
             return {}
         try:
-            with io.open(self.names_cache_filename, 'r', encoding='utf-8') as reader:
+            with open(self.names_cache_filename, 'r') as reader:
                 cache = json.load(reader)
             return cache
         except (IOError, ValueError) as e:
@@ -119,7 +118,7 @@ def update_name_cache(self, cache_data):
         """Update name cache file with new data."""
         try:
             ensure_directory_exists(self.cache_dir)
-            with io.open(self.names_cache_filename, 'w', encoding='utf-8') as writer:
+            with open(self.names_cache_filename, 'w') as writer:
                 json.dump(cache_data, writer)
         except (IOError, ValueError) as e:
             log.warning("Error writing to cache file: %s", e)