tests: Replace deprecated setup method (#105)

Nose's `setup` method is deprecated since Pytest 7.2.

See https://docs.pytest.org/en/stable/deprecations.html#support-for-tests-written-for-nose for details.

Fixes: #104

Signed-off-by: Stanislav Levin <[email protected]>

t/unit/test_synchronization.py

@@ -8,7 +8,7 @@
 
 class test_barrier:
 
-    def setup(self):
+    def setup_method(self):
         self.m1, self.m2, self.m3 = Mock(), Mock(), Mock()
         self.ps = [promise(self.m1), promise(self.m2), promise(self.m3)]