fixes #178: update webpack peer dep

Author: shellscape

package.json

@@ -4,7 +4,7 @@
   "author": "Tobias Koppers @sokra",
   "description": "Offers a dev middleware for webpack, which arguments a live bundle to a directory",
   "peerDependencies": {
-    "webpack": "1 || ^2.1.0-beta || ^2.2.0-rc.0"
+    "webpack": "1 || ^2.6.1"
   },
   "dependencies": {
     "memory-fs": "~0.4.1",
@@ -23,7 +23,7 @@
     "should": "^11.1.0",
     "sinon": "^1.17.5",
     "supertest": "^2.0.0",
-    "webpack": "^2.2.0"
+    "webpack": "^2.6.1"
   },
   "license": "MIT",
   "engines": {