Get all the require paths for a given file.

@param {VinylFile} file		File to get for.
@param {Object} options		Options object.
@returns {Array.<string>}	Dependency paths.
function getRequires(file, options) {
	return [...fileRequires(file, options)].map(async (moduleId)=>{
		if (options.internalOnly && (moduleId.charAt(0) !== '.') && (moduleId.charAt(0) !== '/')) {
			if (options.mapper[moduleId] !== true) return undefined;
		}

		if (options.mapper.hasOwnProperty(moduleId) && !(options.internalOnly && (options.mapper[moduleId] === true))) {
			if (options.mapper[moduleId]) return resolveModule(options.mapper[moduleId], options);
			return undefined;
		}
		return resolveModule(moduleId, options, path.dirname(file.path));
	});
}