Fix py parser not treating 204/304/1xx as an empty body #21

Job	Run time
Linter	1m 13s
Generate llhttp sources	6s
Test (3.8, ubuntu, false)	4m 45s
Test (3.8, windows, false)	4m 32s
Test (3.8, Y, ubuntu, false)	4m 27s
Test (3.9, ubuntu, false)	4m 44s
Test (3.9, macos, false)	4m 42s
Test (3.9, windows, false)	4m 40s
Test (3.9, Y, ubuntu, false)	4m 44s
Test (3.10, ubuntu, false)	4m 44s
Test (3.10, macos, false)	4m 41s
Test (3.10, windows, false)	4m 36s
Test (3.10, Y, ubuntu, false)	5m 42s
Test (pypy-3.8, Y, ubuntu, false)	4m 45s
Test (macos, 3.11, true, Y)	4m 45s
Test (ubuntu, 3.11, false, Y)	4m 43s
Test (windows, 3.11, true, Y)	3m 39s
Test (ubuntu, 3.12, true, Y)	4m 45s
Test (macos, 3.12, true, Y)	4m 45s
Test (windows, 3.12, true, Y)	3m 30s
check	4s
Pre-Deploy	0s
Tarball	0s
Build wheels on ${{ matrix.os }} ${{ matrix.qemu }}	0s
Deploy	0s
	1h 24m 32s

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