Bump crossbeam-channel from 0.5.4 to 0.5.8#16

dependabot[bot] wants to merge 1 commit intomasterActivityWatch/mpsc_requests:masterfrom

dependabot/cargo/crossbeam-channel-0.5.8ActivityWatch/mpsc_requests:dependabot/cargo/crossbeam-channel-0.5.8Copy head branch name to clipboard