Tests

Fix annotation for `dbapi2.Cursor.description` #909

Job	Run time
Build bloomberg-comdb2 from source	4m 19s
Build python-comdb2 source distribution	40s
Test suite (3.8)	41s
Test suite (3.12)	34s
Test suite (3.10)	45s
Test suite (3.9)	31s
Test suite (3.11)	27s
Test suite (3.13)	38s
	8m 35s

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