Minor package updates.

Author: leakymemory

package.json

@@ -9,19 +9,19 @@
     "react-dom": "^15.5.4"
   },
   "devDependencies": {
-    "@types/classnames": "^0.0.32",
+    "@types/classnames": "^2.2.0",
     "@types/enzyme": "^2.8.0",
     "@types/es6-shim": "^0.31.33",
     "@types/history": "^4.5.1",
     "@types/jasmine": "^2.5.47",
     "@types/node": "^7.0.18",
     "@types/react": "^15.0.24",
-    "@types/react-dom": "^0.14.23",
+    "@types/react-dom": "^15.5.0",
     "@types/sinon": "^2.2.1",
     "@types/webpack": "^2.2.15",
     "@types/webpack-env": "^1.13.0",
     "awesome-typescript-loader": "^3.1.3",
-    "cross-env": "^4.0.0",
+    "cross-env": "^5.0.0",
     "css-loader": "^0.28.1",
     "enzyme": "^2.8.2",
     "es6-promise": "^4.1.0",
@@ -40,11 +40,11 @@
     "path": "^0.12.7",
     "phantomjs-polyfill-find": "^0.0.1",
     "postcss-browser-reporter": "^0.5.0",
-    "postcss-cssnext": "^2.10.0",
-    "postcss-import": "^9.1.0",
-    "postcss-loader": "^1.3.3",
+    "postcss-cssnext": "^2.11.0",
+    "postcss-import": "^10.0.0",
+    "postcss-loader": "^2.0.5",
     "postcss-reporter": "^3.0.0",
-    "postcss-url": "^6.0.4",
+    "postcss-url": "^6.1.0",
     "react-addons-test-utils": "^15.5.1",
     "react-dev-utils": "^0.5.2",
     "react-dom": "^15.5.4",