Copy, meet paste. Introduce `wp comment-meta`, derived from `wp user-meta`
Merge pull request #869 from wp-cli/comment-meta-command

Implement `wp comment meta`
avoid leaking private \WP_CLI\Runner properties and methods
implement `wp cli info --format=json`
fix 'Warning: unknown --info parameter'
Merge pull request #879 from wp-cli/wp-cli-ssh

Do something about wp-cli-ssh
Merge branch 'master' into fix-global-prompt-805
Introduce `\WP_CLI::set_url()`, which will set the URL context for the execution.
Use the new `set_url()` method introduced in ab45bfd
Move these methods to where they should be
Test install via prompting