improve CI and local reproducibility #418

Job	Run time
package	6s
macOS 3.7	1s
Windows 3.7	1s
Ubuntu 20.04 (OpenSSL 1.1.1) 3.7	1s
Ubuntu Latest (OpenSSL 3+) 3.7	1s
macOS 3.8	1s
Windows 3.8	1s
Ubuntu 20.04 (OpenSSL 1.1.1) 3.8	1s
Ubuntu Latest (OpenSSL 3+) 3.8	1s
macOS 3.9	1s
Windows 3.9	1s
Ubuntu 20.04 (OpenSSL 1.1.1) 3.9	1s
Ubuntu Latest (OpenSSL 3+) 3.9	1s
macOS 3.10	20s
Windows 3.10	6s
Ubuntu 20.04 (OpenSSL 1.1.1) 3.10	11s
Ubuntu Latest (OpenSSL 3+) 3.10	10s
macOS 3.11	19s
Windows 3.11	2s
Ubuntu 20.04 (OpenSSL 1.1.1) 3.11	19s
Ubuntu Latest (OpenSSL 3+) 3.11	6s
macOS 3.12	2s
Windows 3.12	1s
Ubuntu 20.04 (OpenSSL 1.1.1) 3.12	6s
Ubuntu Latest (OpenSSL 3+) 3.12	6s
macOS 3.13	1s
Windows 3.13	1s
Ubuntu 20.04 (OpenSSL 1.1.1) 3.13	1s
Ubuntu Latest (OpenSSL 3+) 3.13	1s
Ubuntu Latest (OpenSSL 3+) pypy-3.7 test-pypy	1s
Ubuntu Latest (OpenSSL 3+) pypy-3.8 test-pypy	1s
Ubuntu Latest (OpenSSL 3+) pypy-3.9-v7.3.13 test-pypy	1s
Ubuntu Latest (OpenSSL 3+) pypy-3.10 test-pypy	1s
Ubuntu Latest (OpenSSL 3+) 3.x test_brotlipy	1s
Ubuntu 20.04 (OpenSSL 1.1.1) 3.9.2 test-3.9	1s
coverage	8s
	2m 24s

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