Use ConfigParser instead of SafeConfigParser

The configparser's SafeConfigParser has been renamed to ConfigParser in
Python 3.2 [1]. It was finally removed in Python 3.12 [2].

[1] https://docs.python.org/dev/whatsnew/3.2.html#configparser
[2] https://docs.python.org/3/whatsnew/3.12.html#configparser

versioneer.py

@@ -340,9 +340,9 @@ def get_config_from_root(root):
     # configparser.NoOptionError (if it lacks "VCS="). See the docstring at
     # the top of versioneer.py for instructions on writing your setup.cfg .
     setup_cfg = os.path.join(root, "setup.cfg")
-    parser = configparser.SafeConfigParser()
+    parser = configparser.ConfigParser()
     with open(setup_cfg, "r") as f:
-        parser.readfp(f)
+        parser.read_file(f)
     VCS = parser.get("versioneer", "VCS")  # mandatory
 
     def get(parser, name):