v2.1.0-beta.1

• Test: 182d2aa use testMatch for jest
• Improved ae60db3 update react libs
• Fixed 1a2a206 Prevent swallowing webpack warnings on startup
• Fixed 327b4ca add sourcemaps to postcss loader when production or staging
• Fixed 56a9a82 fix webpack-dev-server/client script
• Fixed cf14db0 bump react-hot-loader to fix prop-types warning
• Fixed 2eecbf3 map ekko port options
• Dev d20bba0 use react-dev-utils to format errors
• Added #71: Rewrite URLs for header and body on proxy requests and response