WordPress bumped the minimum supported version to 4.1. WP-CLI's minimum supported WP version is 3.7. Should we consider increasing our minimum supported version?

Originally https://wordpress.slack.com/archives/C02RP4T41/p1669205224451499

Done is:

• We've made a decision on our minimum supported WP version policy.
• The policy is documented to the website in the appropriate forum.
• We've announced the policy in a make/cli blog post.