ci: update remote browsers in saucelabs and browserstack

Updates the remote browsers in SL and BS. We also updated
Chromium and Firefox recently through `dev-infra`.

Author: devversion

test/browser-providers.js

@@ -5,8 +5,8 @@
  *   - `saucelabs`: Launches the browser within Saucelabs
  */
 const browserConfig = {
-  'iOS14': {unitTest: {target: 'saucelabs'}},
-  'Safari13': {unitTest: {target: 'browserstack'}},
+  'iOS15': {unitTest: {target: 'saucelabs'}},
+  'Safari15': {unitTest: {target: 'browserstack'}},
 };
 
 /** Exports all available custom Karma browsers. */

test/karma-browsers.json

@@ -1,18 +1,18 @@
 {
   "SAUCELABS_IOS14": {
     "base": "SauceLabs",
-    "appiumVersion": "1.20.1",
+    "appiumVersion": "1.22.0",
     "deviceOrientation": "portrait",
     "browserName": "Safari",
-    "platformVersion": "14.3",
+    "platformVersion": "15.0",
     "platformName": "iOS",
-    "deviceName": "iPhone 12 Pro Simulator"
+    "deviceName": "iPhone 13 Pro Max Simulator"
   },
-  "BROWSERSTACK_SAFARI13": {
+  "BROWSERSTACK_SAFARI15": {
     "base": "BrowserStack",
     "browser": "Safari",
-    "browser_version": "13.1",
+    "browser_version": "15.0",
     "os": "OS X",
-    "os_version": "Catalina"
+    "os_version": "Monterey"
   }
 }