build(deps): bump flat and @vue/cli-plugin-unit-mocha in /client#21

dependabot[bot] wants to merge 1 commit intomainmicrosoft/OneLabeler:mainfrom

dependabot/npm_and_yarn/client/flat-and-vue/cli-plugin-unit-mocha-5.0.2microsoft/OneLabeler:dependabot/npm_and_yarn/client/flat-and-vue/cli-plugin-unit-mocha-5.0.2Copy head branch name to clipboard