Fix linting

.eslintignore

@@ -4,3 +4,4 @@ node_modules
 **/build
 jupyterlab/staging/yarn.js
 jupyterlab/static
+jupyterlab/chrome-test.js

tests/karma.conf.js

@@ -1,7 +1,7 @@
 var path = require('path');
 var webpack = require('./webpack.config');
 
-process.env.CHROME_BIN = require('puppeteer').executablePath()
+process.env.CHROME_BIN = require('puppeteer').executablePath();
 
 module.exports = function (config) {
   config.set({