jest: update for jest-cli@^20

Author: lukeed

packages/jest/index.js

@@ -6,6 +6,6 @@ module.exports = function (task) {
 	const rootDir = task.root;
 	task.plugin('jest', { every:false }, function * (_, opts) {
 		const config = Object.assign({ rootDir }, opts);
-		runCLI({ config }, rootDir);
+		runCLI({ config }, [rootDir]);
 	});
 };