bumping selector tokenizer

Author: geelen

package.json

@@ -15,7 +15,7 @@
     "url": "https://github.com/css-modules/postcss-modules-local-by-default.git"
   },
   "dependencies": {
-    "css-selector-tokenizer": "^0.5.1",
+    "css-selector-tokenizer": "^0.6.0",
     "postcss": "^5.0.4"
   },
   "devDependencies": {