Add require_cothread to relevant tests

cothread doesn't exist on Windows.

Author: AlexanderWells-diamond

tests/test_records.py

@@ -351,16 +351,19 @@ def test_on_update_false_false(self, out_records):
         always_update is False and the put'ed value is always different"""
         self.on_update_runner(out_records, False, False)
 
+    @requires_cothread
     def test_on_update_false_true(self, out_records):
         """Test that on_update works correctly for all out records when
         always_update is False and the put'ed value is always the same"""
         self.on_update_runner(out_records, False, True)
 
+    @requires_cothread
     def test_on_update_true_true(self, out_records):
         """Test that on_update works correctly for all out records when
         always_update is True and the put'ed value is always the same"""
         self.on_update_runner(out_records, True, True)
 
+    @requires_cothread
     def test_on_update_true_false(self, out_records):
         """Test that on_update works correctly for all out records when
         always_update is True and the put'ed value is always different"""