Bump macOS build dependencies
Bump macOS build dependencies

* OpenSSL 1.1.1a to 1.1.1c
* Python 3.7.2 to 3.7.3

Signed-off-by: Christopher Crone <0bd24f27efbdecb22ed8ee46cb16be12b5608d69@docker.com>

thaJeztah/compose,vdemeester/compose,vdemeester/compose,thaJeztah/compose