Type fixes. #720

Job	Run time
Build and Test PowerSync Service	1m 22s
Core Test	1m 20s
MySQL Test (5.7)	1m 42s
MongoDB Test (6.0)	2m 4s
Postgres Test (11)	6m 45s
MySQL Test (8)	1m 44s
MongoDB Test (7.0)	2m 17s
Postgres Test (12)	6m 36s
MySQL Test (8.4)	1m 45s
MongoDB Test (8.0)	2m 13s
Postgres Test (13)	6m 39s
Postgres Test (14)	6m 36s
Postgres Test (15)	6m 28s
Postgres Test (16)	6m 18s
	53m 49s

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