Returns a list of babel plugins to be used during transpilation
Fold.processBabelPlugins(babel, babelOptions)
Returns a list of babel plugins to be used during transpilation
Parameters
- 
			babel{Object}The babel object exported by babel-standalone 
- 
			babelOptions{The babel configuration options}The babel configuration object 
Returns
{Promise<BabelPlugin | [>}
		Promise that resolves to a list of babel plugins
Collects the babel plugins defined in
babelOptions.pluginsplus the environment dependant plugins.