Bump arc-swap from 0.4.4 to 0.4.8 in /손정우/2020-03/2020-03-18/chat_client#20

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dependabot/cargo/2020-03/2020-03-18/chat_client/arc-swap-0.4.8DSM-UP/Study:dependabot/cargo/2020-03/2020-03-18/chat_client/arc-swap-0.4.8Copy head branch name to clipboard