Auto merge of #904 - mitsuhiko:feature/term-meta-propagation, r=kbknapp
Auto merge of #904 - mitsuhiko:feature/term-meta-propagation, r=kbknapp

Propagate terminal widths to subcommands

This fixes #901

kbknapp/clap-rs,clap-rs/clap,kbknapp/clap-rs,clap-rs/clap,clap-rs/clap