Revert "Use datetime.UTC alias"

This reverts commit 795e768.

Author: pyctrl

tests/conftest.py

@@ -7,7 +7,7 @@
 
 @pytest.fixture
 def derived_error():
-    ts = datetime.datetime.now(datetime.UTC)
+    ts = datetime.datetime.now(datetime.timezone.utc)
     return errors.DerivedError(
         name="John",
         surname="Brown",

tests/error/test_dumping.py

@@ -7,7 +7,7 @@
 from izulu import root
 from tests import errors
 
-TS = datetime.datetime.now(datetime.UTC)
+TS = datetime.datetime.now(datetime.timezone.utc)
 
 
 @pytest.mark.parametrize(

tests/error/test_error.py

@@ -8,7 +8,7 @@
 from izulu import root
 from tests import errors
 
-TS = datetime.datetime.now(datetime.UTC)
+TS = datetime.datetime.now(datetime.timezone.utc)
 
 
 @mock.patch("izulu.root.Error._override_message")

tests/error/test_stringification.py

@@ -5,7 +5,7 @@
 
 from tests import errors
 
-TS = datetime.datetime.now(datetime.UTC)
+TS = datetime.datetime.now(datetime.timezone.utc)
 
 
 @pytest.mark.parametrize(

tests/test_utils.py

@@ -9,7 +9,7 @@
 
 count = 42
 owner = "somebody"
-dt = datetime.datetime.now(datetime.UTC)
+dt = datetime.datetime.now(datetime.timezone.utc)
 
 
 @pytest.mark.parametrize(