fix: Update the SauceLabs Safari profile to match isomorphic-git

Author: seanpoulter

karma.conf.js

@@ -85,8 +85,8 @@ module.exports = function (config) {
       sl_safari: {
         base: 'SauceLabs',
         browserName: 'safari',
-        platform: 'macOS 10.15',
-        version: '13.1',
+        platform: 'macOS 11.00',
+        version: '14',
       },
       sl_ios_safari: {
         base: 'SauceLabs',