feat: migrate to latest chromium based edge

BREAKING CHANGE: doesn't work with old MS Edge anymore.

lib/browsers/edge.js

@@ -1,32 +1,32 @@
-/* eslint-disable no-console */
-// https://github.com/jslegers/karma-edge-launcher/blob/master/index.js
+const getExe = require('../get-exe');
+const tmp = require('tmp');
+tmp.setGracefulCleanup();
 
-const path = require('path');
-const {execSync} = require('child_process');
+module.exports = function() {
+  const tmpobj = tmp.dirSync({unsafeCleanup: true});
 
-const backslashRegex = /\\/g;
-const escapeBackslash = '\\\\';
-const spaceRegex = / /g;
-const escapeSpace = '` ';
-const startScriptPath = path
-  .join(__dirname, 'start_edge.ps1')
-  .replace(backslashRegex, escapeBackslash)
-  .replace(spaceRegex, escapeSpace);
-
-function killEdgeProcess() {
-  try {
-    execSync('taskkill /t /f /im MicrosoftEdge.exe');
-  } catch (err) {
-    console.error('Killing Edge process failed. ' + err);
+  return {
+    path: {
+      win32: getExe('Microsoft\\Edge\\Application\\msedge.exe')
+    },
+    args: [
+      '--user-data-dir=' + tmpobj.name,
+      // https://github.com/GoogleChrome/chrome-launcher/blob/master/docs/chrome-flags-for-tools.md#--enable-automation
+      '--enable-automation',
+      '--no-default-browser-check',
+      '--no-first-run',
+      '--disable-default-apps',
+      '--disable-popup-blocking',
+      '--disable-translate',
+      '--disable-background-timer-throttling',
+      // on macOS, disable-background-timer-throttling is not enough
+      // and we need disable-renderer-backgrounding too
+      // see https://github.com/karma-runner/karma-chrome-launcher/issues/123
+      '--disable-renderer-backgrounding',
+      '--disable-device-discovery-notifications'
+    ],
+    onExit() {
+      tmpobj.removeCallback();
+    }
   }
-}
-
-module.exports = {
-  path: {
-    win32: 'C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe'
-  },
-  args: [
-    startScriptPath
-  ],
-  onExit: killEdgeProcess
 };