Add changelog for 1.8.0

Author: SpaceK33z

CHANGELOG.md

@@ -1,3 +1,12 @@
+# 1.8.0 (2016-09-17)
+
+- Add tests for everything ([#121](https://github.com/webpack/webpack-dev-middleware/issues/121))!
+- Use valid license for npm ([`af6243b`](https://github.com/webpack/webpack-dev-middleware/commit/af6243b4f4cf7da00923c8cddef20c4cfb5d145c)).
+- Instantiate the in-memory filesystem only once, meaning it can be shared when using multiple middleware instances with one webpack config ([#120](https://github.com/webpack/webpack-dev-middleware/pull/120)).
+- When sending requests with a `Range` header, the status code would not always be correct ([`cedc09f`](https://github.com/webpack/webpack-dev-middleware/commit/cedc09f714fa1e8ef35cbe373466c6d56db0ac4f)).
+- Middleware would not work with a proxy ([#80](https://github.com/webpack/webpack-dev-middleware/pull/80)).
+- Add `index` option (default: `index.html`) to customize the file used as index for a directory ([#123](https://github.com/webpack/webpack-dev-middleware/pull/123)).
+
 # 1.7.0 (2016-09-10)
 
 - Add `reporter` option for custom logs ([#91](https://github.com/webpack/webpack-dev-middleware/pull/91)).