Fix deprecation warning

DeprecationWarning: datetime.datetime.utcfromtimestamp() is deprecated and scheduled for removal in a future version. Use timezone-aware objects to represent datetimes in UTC: datetime.datetime.fromtimestamp(timestamp, datetime.UTC).
    decoder=lambda t: datetime.datetime.utcfromtimestamp(t / 1000),

aws_log_parser/models.py

@@ -258,7 +258,10 @@ class WafLogEntry(LogEntry):
     timestamp: datetime.datetime = field(
         metadata=config(
             encoder=lambda t: datetime.datetime.timestamp(t) * 1000,
-            decoder=lambda t: datetime.datetime.utcfromtimestamp(t / 1000),
+            decoder=lambda t: datetime.datetime.fromtimestamp(
+                t / 1000,
+                datetime.timezone.utc,
+            ),
         )
     )
     formatVersion: int

test/test_parse_waf.py

@@ -20,7 +20,16 @@
 @pytest.fixture
 def base_waf_entry():
     return WafLogEntry(
-        timestamp=datetime.datetime(2018, 8, 8, 0, 44, 30, 589000),
+        timestamp=datetime.datetime(
+            2018,
+            8,
+            8,
+            0,
+            44,
+            30,
+            589000,
+            tzinfo=datetime.timezone.utc,
+        ),
         formatVersion=1,
         webaclId="385cb038-3a6f-4f2f-ac64-09ab912af590",
         terminatingRuleId="Default_Action",

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 isolated_build = true
-envlist = py{38,39,310,311,312}-pytest{latest},lint
+envlist = py{310,311,312}-pytest{latest},lint
 
 [testenv]
 allowlist_externals = poetry
@@ -20,8 +20,6 @@ commands =
 
 [gh-actions]
 python =
-    3.8: py38
-    3.9: py39
     3.10: py310
     3.11: py311
     3.12: py312,lint