fix(global): use window and global instead of this

Now to provide `bemNaming` to global scope using `this`.

In NodeJS `this` link to `module.exports`, but not in `global`
variables.

For browsers need use `window` variable.

Author: blond

index.js

@@ -335,4 +335,4 @@ if (typeof define === 'function') {
 
 /* istanbul ignore next */
 defineAsGlobal && (global.bemNaming = createNaming);
-})(this);
+})(typeof window !== 'undefined' ? window : global);