fixed unit tests to run on Py3.12

CHANGELOG.md

@@ -8,4 +8,5 @@ Build system
 
 * Python 3.6 support dropped as it does not emply pyproject.toml, which is necessary
   to build this
+* fixed unit tests to run on Py3.12
 * removed Docker unit tests

tests/test_coding/test_overloading.py

@@ -35,11 +35,11 @@ class TestOverloading(unittest.TestCase):
 
         @overload
         def fun(a: B):
-            self.assertEquals(type(a), B)
+            self.assertEqual(type(a), B)
 
         @fun.overload
         def fun(a: A):
-            self.assertEquals(type(a), A)
+            self.assertEqual(type(a), A)
 
         fun(A())
         fun(B())