Bump json5, babel-loader, css-loader, exports-loader, file-loader, imports-loader, url-loader and webpack#21

dependabot[bot] wants to merge 1 commit intomasterStableUnit/stableunit.org:masterfrom

dependabot/npm_and_yarn/json5-and-babel-loader-and-css-loader-and-exports-loader-and-file-loader-and-imports-loader-and-url-loader-and-webpack-2.2.2StableUnit/stableunit.org:dependabot/npm_and_yarn/json5-and-babel-loader-and-css-loader-and-exports-loader-and-file-loader-and-imports-loader-and-url-loader-and-webpack-2.2.2Copy head branch name to clipboard