chore(package): fix broken links && update devDependencies (#531)

Author: michael-ciniawsky

package.json

@@ -24,23 +24,23 @@
     "webpack-sources": "^1.0.1"
   },
   "devDependencies": {
-    "codecov.io": "^0.1.2",
+    "codecov.io": "^0.1.6",
     "coveralls": "^2.11.2",
-    "css-loader": "^0.26.1",
-    "file-loader": "^0.9.0",
+    "css-loader": "^0.28.4",
+    "file-loader": "^0.11.2",
     "istanbul": "^0.4.5",
     "mocha": "^3.2.0",
-    "mocha-lcov-reporter": "1.2.0",
+    "mocha-lcov-reporter": "1.3.0",
     "raw-loader": "^0.5.1",
     "should": "^11.1.2",
-    "standard-version": "^4.0.0",
-    "style-loader": "^0.13.0",
-    "webpack": "^2.2.0"
+    "standard-version": "^4.1.0",
+    "style-loader": "^0.18.2",
+    "webpack": "^2.6.1"
   },
-  "homepage": "http://github.com/webpack/extract-text-webpack-plugin",
+  "homepage": "http://github.com/webpack-contrib/extract-text-webpack-plugin",
   "repository": {
     "type": "git",
-    "url": "http://github.com/webpack/extract-text-webpack-plugin.git"
+    "url": "http://github.com/webpack-contrib/extract-text-webpack-plugin.git"
   },
   "license": "MIT",
   "scripts": {