Ciphers supports padding parameter; Upgrade tongsuo from 8.3.1 to 8.4.0 #89

Job	Run time
linux (3.12, flake)	20s
linux (pypy-3.9, tests-nocoverage, 8.4.0)	1m 53s
macos (macos-13, x86_64, 3.7, tests-nocoverage)	3m 14s
linux (pypy-3.10, tests-nocoverage, 8.4.0)	2m 2s
macos (macos-13, x86_64, 3.12, tests)	2m 39s
windows (x86, win32, VC-WIN32, 3.7, tests-nocoverage, 8.4.0, 0)	10m 2s
linux (3.12, tests-randomorder, 8.4.0)	1m 52s
macos (macos-14, arm64, 3.12, tests)	1m 49s
windows (x86, win32, VC-WIN32, 3.7, tests-nocoverage, 8.4.0, 1)	10m 48s
linux (3.12, tests, 8.4.0)	2m 2s
windows (x86, win32, VC-WIN32, 3.7, tests-nocoverage, 8.4.0, 2)	9m 17s
windows (x86, win32, VC-WIN32, 3.12, tests, 8.4.0, 0)	10m 17s
windows (x86, win32, VC-WIN32, 3.12, tests, 8.4.0, 1)	10m 37s
windows (x86, win32, VC-WIN32, 3.12, tests, 8.4.0, 2)	10m 56s
windows (x64, win64, VC-WIN64A, 3.7, tests-nocoverage, 8.4.0, 0)	9m 10s
windows (x64, win64, VC-WIN64A, 3.7, tests-nocoverage, 8.4.0, 1)	7m 50s
windows (x64, win64, VC-WIN64A, 3.7, tests-nocoverage, 8.4.0, 2)	9m 9s
windows (x64, win64, VC-WIN64A, 3.12, tests, 8.4.0, 0)	9m 12s
windows (x64, win64, VC-WIN64A, 3.12, tests, 8.4.0, 1)	8m 26s
windows (x64, win64, VC-WIN64A, 3.12, tests, 8.4.0, 2)	8m 55s
all-green	8s
	2h 10m 38s

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