Tests techs for `vanilla.js` and `node.js`

[veged]

Techs:

• *.test.vanilla.js
• *.test.node.js

Also *.test.browser.js as alias for *.test.js.

cc @dfilatov @mishaberezin

[apsavin]

+1.
As I understand, we also need something like phantomjs tech, but for node.