use sodiumoxide for mlock #125

Job	Run time
Check version	12s
test_py_linux (3.7)	1m 9s
test_py_macos (3.8)	1m 34s
test_py_linux (3.8)	1m 18s
test_py_windows (3.7)	2m 16s
test_py_macos (3.9)	1m 12s
test_py_linux (3.9)	1m 24s
test_rust (ubuntu-latest)	9s
test_py_windows (3.8)	2m 20s
test_py_macos (3.10)	1m 13s
test_rust (macos-latest)	6s
test_py_linux (3.10)	1m 16s
test_py_macos (3.11)	1m 7s
test_rust (windows-latest)	7s
test_py_windows (3.9)	2m 19s
test_py_linux (3.11)	1m 14s
test_py_macos (3.12)	1m 11s
test_py_windows (3.10)	2m 16s
test_py_linux (3.12)	1m 11s
test_py_windows (3.11)	2m 20s
test_py_windows (3.12)	2m 16s
build_linux	0s
build_windows	0s
build_sdist	0s
build_macos	0s
Create release and publish to PyPI	0s
	28m 10s

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