Bump minimist from 1.2.0 to 1.2.5

minimist@1.2.2 and earlier had "a prototype pollution bug that could
cause privilege escalation in some circumstances when handling untrusted
user input." [Source: https://github.com/substack/minimist#security]

Unfortunately, mocha@7.x also has a dependency on a vulnerable minimist
version through the mkdirp package; but at this point it seems likely
that this will only get addressed in mocha@8.0:
mochajs/mocha#4199.

This update partially addresses the security alert raised by GitHub in
https://github.com/aerospike/aerospike-client-nodejs/network/alert/package-lock.json/minimist/open