Add typings #529

Job	Run time	Billable time
test-postgres (9.5)	3m 3s	0s
test-platforms (3.8, ubuntu-latest, asyncio)	2m 8s	0s
test-postgres (9.6)	2m 57s	0s
test-platforms (3.8, ubuntu-latest, uvloop)	2m 14s	0s
test-postgres (10)	2m 27s	0s
test-platforms (3.8, macos-latest, asyncio)	2m 54s	0s
test-postgres (11)	2m 32s	0s
test-platforms (3.8, macos-latest, uvloop)	2m 35s	0s
test-postgres (12)	2m 41s	0s
test-platforms (3.8, windows-latest, asyncio)	5m 32s	0s
test-postgres (13)	2m 50s	0s
test-platforms (3.9, ubuntu-latest, asyncio)	2m 18s	0s
test-postgres (14)	2m 30s	0s
test-platforms (3.9, ubuntu-latest, uvloop)	2m 11s	0s
test-postgres (15)	2m 37s	0s
test-platforms (3.9, macos-latest, asyncio)	2m 51s	0s
test-postgres (16)	2m 30s	0s
test-platforms (3.9, macos-latest, uvloop)	2m 42s	0s
test-platforms (3.9, windows-latest, asyncio)	5m 4s	0s
test-platforms (3.10, ubuntu-latest, asyncio)	1m 56s	0s
test-platforms (3.10, ubuntu-latest, uvloop)	2m 3s	0s
test-platforms (3.10, macos-latest, asyncio)	3m 4s	0s
test-platforms (3.10, macos-latest, uvloop)	3m 39s	0s
test-platforms (3.10, windows-latest, asyncio)	4m 58s	0s
test-platforms (3.11, ubuntu-latest, asyncio)	1m 58s	0s
test-platforms (3.11, ubuntu-latest, uvloop)	1m 55s	0s
test-platforms (3.11, macos-latest, asyncio)	3m 27s	0s
test-platforms (3.11, macos-latest, uvloop)	2m 52s	0s
test-platforms (3.11, windows-latest, asyncio)	5m 18s	0s
test-platforms (3.12, ubuntu-latest, asyncio)	2m 3s	0s
test-platforms (3.12, macos-latest, asyncio)	2m 56s	0s
test-platforms (3.12, windows-latest, asyncio)	5m 47s	0s
Regression Tests	0s	0s
	1h 36m 32s	0s

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