update webpack-dev-middleware dependency to v3.1.3 (#1392)

* update webpack-dev-middleware dependency to v3.1.3

* removed semver from webpack-dev-middleware dependency

Author: dennispg

package-lock.json

@@ -67,7 +67,7 @@
     "spdy": "^3.4.1",
     "strip-ansi": "^3.0.0",
     "supports-color": "^5.1.0",
-    "webpack-dev-middleware": "3.1.2",
+    "webpack-dev-middleware": "3.1.3",
     "webpack-log": "^1.1.2",
     "yargs": "11.0.0"
   },