Add explicit browserslist config

Author: dkokic

package.json

@@ -51,5 +51,15 @@
     "style-loader": "^0.13.0",
     "webpack": "2.2.0",
     "webpack-dev-server": "2.2.0"
+  },
+  "browserslist": {
+    "production": [
+      "> 1%",
+      "ie 10"
+    ],
+    "development": [
+      "last 1 chrome version",
+      "last 1 firefox version"
+    ]
   }
 }