fix: updated dependencies

Author: Michel Hofmann

package.json

@@ -35,12 +35,12 @@
   "homepage": "https://github.com/1337programming/webpack-shell-plugin",
   "devDependencies": {
     "babel-core": "^6.7.6",
-    "babel-preset-es2015-rollup": "^1.1.1",
-    "css-loader": "^0.23.1",
-    "eslint": "^2.7.0",
-    "rollup": "^0.25.8",
+    "babel-preset-es2015-rollup": "^3.0.0",
+    "css-loader": "^0.28.0",
+    "eslint": "^3.19.0",
+    "rollup": "^0.41.6",
     "rollup-plugin-babel": "^2.4.0",
-    "style-loader": "^0.13.1",
-    "webpack": "^1.13.1"
+    "style-loader": "^0.16.1",
+    "webpack": "^2.4.1"
   }
 }