Drop Support for Firefox 91, Safari 13, and edge 93

With the release of Safari 16 we're no longer supporting Safari 13 and
can drop it from our tests.

Firefox ESR 91 is now EOL and 102 is the only supported ESR version so
we can update our tests to stop checking ESR 91.

Edge 104 is the currently active edge version.

.github/workflows/ci.yml

@@ -111,7 +111,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        firefox-version: [latest-esr, 102.2.0esr, 91.13.0esr]
+        firefox-version: [latest-esr]
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3

testem.browserstack.js

@@ -1,34 +1,25 @@
 const FailureOnlyPerBrowserReporter = require('testem-failure-only-reporter/grouped-by-browser');
+const defaultArgs = ['-t', '1800', '--browserstack.video', 'false', '--u', '<url>'];
 
-const defaultArgs = [
-  '-t',
-  '1800',
-  '--browserstack.video',
-  'false',
-  '--browserstack.timezone',
-  'UTC',
-  '--u',
-  '<url>',
-];
 const BrowserStackLaunchers = {
   BS_OSX_Safari: {
     exe: 'node_modules/.bin/browserstack-launch',
     args: [
       '--os',
       'OS X',
       '--osv',
-      'Catalina',
+      'Big Sur',
       '--b',
       'safari',
       '--bv',
-      'latest', // Will always be 13.x on Catalina
+      'latest', // Will always be 14.x on Big Sur
       ...defaultArgs,
     ],
     protocol: 'browser',
   },
   BS_MS_Edge: {
     exe: 'node_modules/.bin/browserstack-launch',
-    args: ['--os', 'Windows', '--osv', '10', '--b', 'edge', '--bv', '93', ...defaultArgs],
+    args: ['--os', 'Windows', '--osv', '10', '--b', 'edge', '--bv', '104', ...defaultArgs],
     protocol: 'browser',
   },
   BS_IOS_SAFARI: {
@@ -39,11 +30,11 @@ const BrowserStackLaunchers = {
       '--os',
       'ios',
       '--osv',
-      '14',
+      '15',
       '--b',
       'iphone',
       '--device',
-      'iPhone 11',
+      'iPhone 13 Pro',
       ...defaultArgs,
     ],
     protocol: 'browser',