Update test expectations

With the new citation matcher more references are matched. Consequently,
the number of msc in the references is higher than before.

tests/test_basic.py

@@ -5,6 +5,6 @@
 def test_get_client():
     s = ZbPreviewSickle()
     row = s.GetRecord(de=6675366)
-    assert len(row.get_refs()) == 36
+    assert len(row.get_refs()) == 45
     assert row.get_text() == ""
     assert row.get_doi() == "10.1515/math-2016-0103"