js techs

js-технологии как в bem-core:
* [vanilla-js](https://github.com/bem/bem-core/blob/feature/modules/.bem/techs/vanilla.js.js)
* [browser-js](https://github.com/bem/bem-core/blob/feature/modules/.bem/techs/browser.js.js)
* [node-js](https://github.com/bem/bem-core/blob/feature/modules/.bem/techs/node.js.js)