specify os version in iOS

Author: nurdtechie98

ios/run-local-test/local.conf.js

@@ -14,6 +14,7 @@ exports.config = {
     name: 'local_appium_test',
     build: 'webdriver-browserstack',
     device: 'iPhone 11 Pro',
+    os_version: "13",
     app: process.env.BROWSERSTACK_APP_ID || 'bs://<hashed app-id>',
     'browserstack.local': true,
     'browserstack.debug': true

ios/run-multiple-test/multiple.conf.js

@@ -12,6 +12,7 @@ exports.config = {
     name: 'multiple_appium_test',
     build: 'webdriver-browserstack',
     device: 'iPhone 11 Pro',
+    os_version: "13",
     app: process.env.BROWSERSTACK_APP_ID || 'bs://<hashed app-id>',
     'browserstack.debug': true
   }],