Bump RN OSS iOS tests to iOS SDK 12.1, Xcode 10.1

Summary:
Use Xcode 10.1 and iOS 12.1 SDK to run iOS tests on an iOS 12.1 iPhone XS Simulator, all of which are available on a default Xcode 10.1 install.

Note that we were previously running iOS tests using Xcode 10.1 and the 12.1 SDK in a separate `test_xcode10` workflow on Circle CI. This was in place to allow us to track Xcode 10 compatibility during the Xcode 10 beta. Now that Xcode 10 has been public for a while, we can drop the compatibility check and use Xcode 10 in our main iOS test workflow.

Reviewed By: TheSavior

Differential Revision: D13317891

fbshipit-source-id: 04c17bf3a2e9d3617f14a46b4ed30a5491a4f4a4

.circleci/config.yml

@@ -350,7 +350,7 @@ android_defaults: &android_defaults
 macos_defaults: &macos_defaults
   <<: *defaults
   macos:
-    xcode: "9.4.0"
+    xcode: "10.1.0"
 
 version: 2
 jobs:
@@ -433,32 +433,6 @@ jobs:
       - store_test_results:
           path: ~/react-native/reports/junit
 
-  # Xcode 10: Runs unit tests on iOS and Apple TV devices
-  test_objc_xcode10:
-    <<: *defaults
-    macos:
-      xcode: "10.0.0"
-    steps:
-      - checkout
-      - run: *setup-artifacts
-      - run: *yarn
-
-      - run: *boot-simulator-iphone
-      - run: *boot-simulator-appletv
-      - run: *brew-install-watchman
-
-      - run: *run-objc-ios-tests
-      - run: *run-objc-tvos-tests
-
-      # TODO: Fix these failing tests.
-      - run: *display-broken-tests-warning
-      - run: *run-podspec-tests
-      - run: *run-objc-ios-e2e-tests
-      - run: *run-objc-tvos-e2e-tests
-
-      - store_test_results:
-          path: ~/react-native/reports/junit
-
   # Runs end to end tests (Detox)
   test_detox_end_to_end:
     <<: *macos_defaults
@@ -709,8 +683,6 @@ workflows:
             - checkout_code
 
       # Tooling Compatibility Checks
-      - test_objc_xcode10:
-          filters: *filter-ignore-gh-pages
       - test_node10:
           filters: *filter-ignore-gh-pages
 

scripts/objc-test-tvos.sh

@@ -24,15 +24,7 @@ source "scripts/.tests.env"
 export TEST_NAME="tvOS"
 export SCHEME="RNTester-tvOS"
 export SDK="appletvsimulator"
-<<<<<<< HEAD
-export DESTINATION="platform=tvOS Simulator,name=Apple TV,OS=11.4"
-
-# If there's a "test" argument, pass it to the test script.
-. ./scripts/objc-test.sh $1
-
-=======
 export DESTINATION="platform=tvOS Simulator,name=${TVOS_DEVICE},OS=${IOS_TARGET_OS}"
 
 # If there's a "test" argument, pass it to the test script.
 ./scripts/objc-test.sh $1
->>>>>>> 5194495e97... Propagate exit code in test_objc (#22562)