Build: Development build now include instrumentation code, updated build scripts
- npm run build will build for development with instrumentation code
- npm run prepublishOnly will build for production
- npm run watch will also run Webpack in watch loop
Build: Automated testing using visual regression testing technique in #1323
- Docker-based automated testing using headless Chrome and Web Driver
- Screenshot comparison using jest-image-snapshot and pixelmatch
- Code is instrumented using istanbul
- Test report is hosted on Coveralls
Added French localization, by @tao1 in PR #1327
Resolve #1344, by updating README.md and adding validation logic for userID props, in #1447
- If userID props present and also embedded in Direct Line token, will use the one from Direct Line token
- If userID props present, they must be string and not prefixed with dl_, to avoid confusion between userID props and Direct Line embedded user ID (which is forgery-proof)
- If userID props does not pass the validation test or not specified, Web Chat will use default-user instead
Added support for Cognitive Services Speech to Text and Text to Speech in PR #1442

Core: Saga will run after custom middleware, in #1331
- Custom middleware run before saga to allow user to modify default behavior
Build: Bump dependencies, in #1303
- @babel
  - @babel/cli@7.1.2
  - @babel/core@7.1.2
  - @babel/plugin-proposal-class-properties@7.1.0
  - @babel/plugin-proposal-object-rest-spread@7.0.0
  - @babel/plugin-transform-runtime@7.1.0
  - @babel/preset-env@7.1.0
  - @babel/preset-react@7.0.0
  - @babel/preset-typescript@7.1.0
  - @babel/runtime@7.1.2
- concurrently@4.0.1
- jest
  - babel-jest@23.6.0
  - jest@23.6.0
  - ts-jest@23.10.4
- typescript@3.1.6
- webpack
  - webpack@4.24.0
  - webpack-command@0.4.2
Fixes Russian localization by @odysseus1973 in PR #1377

Fixes #1397. Patched activities without from field, in PR #1405
Fixes #1237. Added new sample called migration, by @corinagum in PR #1398
Fixes #1332. Updated sample names and add table to README, by @corinagum in PR #1435
Fixes #1125. Added error handling for Adaptive Card JSON render, by @corinagum in PR #1395
Build: Webpack watch mode now emits non-minified code for shorter dev RTT, in #1331