Fix py parser not treating 204/304/1xx as an empty body #11

Job	Run time
Generate llhttp sources	8s
Linter	1m 25s
Test (3.8, ubuntu, false)	5m 8s
Test (3.8, windows, false)	4m 58s
Test (3.8, Y, ubuntu, false)	4m 50s
Test (3.9, ubuntu, false)	5m 12s
Test (3.9, macos, false)	5m 8s
Test (3.9, windows, false)	4m 59s
Test (3.9, Y, ubuntu, false)	5m 6s
Test (3.10, ubuntu, false)	5m 9s
Test (3.10, macos, false)	5m 4s
Test (3.10, windows, false)	4m 59s
Test (3.10, Y, ubuntu, false)	5m 7s
Test (pypy-3.8, Y, ubuntu, false)	5m 8s
Test (macos, 3.11, true, Y)	5m 1s
Test (ubuntu, 3.11, false, Y)	5m 5s
Test (windows, 3.11, true, Y)	4m 57s
Test (ubuntu, 3.12, true, Y)	5m 4s
Test (macos, 3.12, true, Y)	5m 9s
Test (windows, 3.12, true, Y)	4m 31s
check	2s
Pre-Deploy	0s
Tarball	0s
Build wheels on ${{ matrix.os }} ${{ matrix.qemu }}	0s
Deploy	0s
	1h 32m 10s

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