Bump openssl from 0.10.56 to 0.10.60 #1573

Job	Run time
Wheel on macos-latest py-3.7	3m 14s
Wheel on ubuntu-latest py-3.7	1m 39s
Wheel on windows-latest py-3.7	3m 16s
Checks	48s
coverage	4m 59s
Run fuzz targets (macos-latest, 3.7)	48m 38s
Run fuzz targets (ubuntu-latest, 3.7)	21m 12s
Unit tests (macos-latest, 3.7)	5m 42s
Unit tests (ubuntu-latest, 3.7)	3m 7s
Unit tests (windows-latest, 3.7)	5m 21s
Upload to PyPI	0s
	1h 37m 56s

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