chore(package): update dependencies

Author: greenkeeper[bot]

package.json

@@ -15,7 +15,7 @@
     "babel-cli": "^6.23.0",
     "babel-core": "^6.23.1",
     "babel-eslint": "^7.1.1",
-    "babel-loader": "^6.4.0",
+    "babel-loader": "^7.0.0",
     "babel-plugin-transform-class-properties": "^6.23.0",
     "babel-plugin-transform-decorators-legacy": "^1.3.4",
     "babel-plugin-transform-object-rest-spread": "^6.23.0",
@@ -24,13 +24,13 @@
     "babel-preset-react": "^6.23.0",
     "babel-preset-stage-2": "^6.22.0",
     "classnames": "^2.2.5",
-    "cross-env": "^3.1.4",
-    "css-loader": "^0.26.1",
+    "cross-env": "^4.0.0",
+    "css-loader": "^0.28.0",
     "eslint": "^3.15.0",
     "eslint-plugin-react": "^6.10.0",
     "express": "^4.14.1",
     "extract-text-webpack-plugin": "^2.1.0",
-    "file-loader": "^0.10.1",
+    "file-loader": "^0.11.1",
     "fs-extra": "^2.0.0",
     "html-webpack-plugin": "^2.28.0",
     "image-webpack-loader": "^3.2.0",
@@ -47,7 +47,7 @@
     "react-dom": "^15.5.4",
     "react-hot-loader": "^3.0.0-beta.6",
     "serve-static": "^1.12.1",
-    "style-loader": "^0.13.2",
+    "style-loader": "^0.16.1",
     "styled-components": "^2.0.0-15",
     "styletron-react": "^2.5.3",
     "url-loader": "^0.5.8",