build(deps): bump json5, babel-loader, webpack and webpack-cli in /dev/20181221/k2works#248

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dependabot/npm_and_yarn/dev/20181221/k2works/json5-and-babel-loader-and-webpack-and-webpack-cli-2.2.3hiroshima-arc/re_zero_tdd:dependabot/npm_and_yarn/dev/20181221/k2works/json5-and-babel-loader-and-webpack-and-webpack-cli-2.2.3Copy head branch name to clipboard