Fix import under PyPy 3.8/3.9 on Windows #1605

Job	Run time
Linter	57s
Generate llhttp sources	5s
Test (3.8, ubuntu, false)	4m 18s
Test (3.8, windows, false)	6m 57s
Test (3.8, Y, ubuntu, false)	4m 16s
Test (3.9, ubuntu, false)	4m 36s
Test (3.9, macos, false)	6m 2s
Test (3.9, windows, false)	6m 34s
Test (3.9, Y, ubuntu, false)	4m 26s
Test (3.10, ubuntu, false)	5m 55s
Test (3.10, macos, false)	6m 17s
Test (3.10, windows, false)	7m 33s
Test (3.10, Y, ubuntu, false)	4m 3s
Test (pypy-3.8, Y, windows, false)	4m 23s
Test (macos, 3.11, true, Y)	1m 22s
Test (ubuntu, 3.11, false, Y)	4m 22s
Test (windows, 3.11, true, Y)	2m 50s
Test (ubuntu, 3.12, true, Y)	3m 37s
Test (macos, 3.12, true, Y)	6m 0s
Test (windows, 3.12, true, Y)	2m 35s
check	3s
Pre-Deploy	0s
Tarball	0s
Build wheels on ${{ matrix.os }} ${{ matrix.qemu }}	0s
Deploy	0s
	1h 27m 11s

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