configure karma to use chromium

Author: theinterned

test/karma.config.cjs

@@ -1,7 +1,12 @@
-module.exports = function(config) {
+process.env.CHROME_BIN = require('chromium').path
+
+module.exports = function (config) {
   config.set({
     frameworks: ['mocha', 'chai'],
-    files: [{pattern: '../dist/index.js', type: 'module'}, {pattern: 'test.js', type: 'module'}],
+    files: [
+      {pattern: '../dist/index.js', type: 'module'},
+      {pattern: 'test.js', type: 'module'}
+    ],
     reporters: ['mocha'],
     port: 9876,
     colors: true,