Replace pkg_resources with importlib solution (#450)

auditlog/__init__.py

@@ -1,7 +1,15 @@
-from pkg_resources import DistributionNotFound, get_distribution
-
 try:
-    __version__ = get_distribution("django-auditlog").version
-except DistributionNotFound:
-    # package is not installed
-    pass
+    from importlib.metadata import version  # New in Python 3.8
+except ImportError:
+    from pkg_resources import (  # from setuptools, deprecated
+        DistributionNotFound,
+        get_distribution,
+    )
+
+    try:
+        __version__ = get_distribution("django-auditlog").version
+    except DistributionNotFound:
+        # package is not installed
+        pass
+else:
+    __version__ = version("django-auditlog")

docs/source/conf.py

@@ -10,7 +10,7 @@
 import sys
 from datetime import date
 
-from pkg_resources import get_distribution
+from auditlog import __version__
 
 # -- Path setup --------------------------------------------------------------
 
@@ -33,7 +33,7 @@
 author = "Jan-Jelle Kester and contributors"
 copyright = f"2013-{date.today().year}, {author}"
 
-release = get_distribution("django-auditlog").version
+release = __version__
 # for example take major/minor
 version = ".".join(release.split(".")[:2])