Replace unmaintained appdirs with maintained platformdirs

README.rst

@@ -52,14 +52,14 @@ Requirements
 
 - IDNA for converting links to IDNA format
 - uritools for domain name validation
-- appdirs for determining user's cache directory
+- platformdirs for determining user's cache directory
 - dnspython to cache DNS results
 
    ::
 
        pip install idna
        pip install uritools
-       pip install appdirs
+       pip install platformdirs
        pip install dnspython
 
 Example

requirements.txt

@@ -1,7 +1,7 @@
 idna
 uritools
 pytest
-appdirs
+platformdirs
 bump2version
 filelock
 dnspython

setup.py

@@ -67,7 +67,7 @@ def read(readme):
     install_requires=[
         'idna',
         'uritools',
-        'appdirs',
+        'platformdirs',
         'filelock'
     ],
 )

urlextract/cachefile.py

@@ -17,7 +17,7 @@
 
 import idna
 import filelock
-from appdirs import user_cache_dir
+from platformdirs import user_cache_dir
 
 
 class CacheFileError(Exception):