Persist global WP-CLI config when using WP_CLI::launch_self()
Persist global WP-CLI config when using WP_CLI::launch_self()

Use of this method has a reasonable expectation that the launched
process will mirror the existing process as closely as possible.
Including the global WP-CLI config is necessary for mirroring the
existing process.

wp-cli/wp-cli,wp-cli/wp-cli