Fix make test to achieve 100% pass rate by converting entirely
unnecessary references to '/bin/bash' to use '/bin/sh' instead.

Update dependency versions to match 'setup.cfg' _except_ for
py-requests, where the ports currently has only 2.22.0 available, but
upstream is requiring at least 2.23.0. (Waiting on PR 250941) [1]

PR: 252180
Submitted by: Charlie Li