Renamed AppCheck to AppCheckCore (#11581)

Renamed the App Check (Lite) SDK to App Check Core.

AppCheckCore.podspec

@@ -0,0 +1,101 @@
+Pod::Spec.new do |s|
+  s.name             = 'AppCheckCore'
+  s.version          = '10.13.0'
+  s.summary          = 'App Check Core SDK.'
+
+  s.description      = <<-DESC
+  SDK for anti-abuse compatibility.
+                       DESC
+
+  s.homepage         = 'https://firebase.google.com'
+  s.license          = { :type => 'Apache-2.0', :file => 'LICENSE' }
+  s.authors          = 'Google, Inc.'
+
+  s.source           = {
+    :git => 'https://github.com/firebase/firebase-ios-sdk.git',
+    :tag => 'CocoaPods-' + s.version.to_s
+  }
+  s.social_media_url = 'https://twitter.com/Firebase'
+
+  ios_deployment_target = '11.0'
+  osx_deployment_target = '10.13'
+  tvos_deployment_target = '12.0'
+  watchos_deployment_target = '6.0'
+
+  s.swift_version = '5.3'
+
+  s.ios.deployment_target = ios_deployment_target
+  s.osx.deployment_target = osx_deployment_target
+  s.tvos.deployment_target = tvos_deployment_target
+  s.watchos.deployment_target = watchos_deployment_target
+
+  s.cocoapods_version = '>= 1.4.0'
+  s.prefix_header_file = false
+
+  base_dir = "AppCheckCore/"
+
+  s.source_files = [
+    base_dir + 'Sources/**/*.[mh]',
+  ]
+  s.public_header_files = base_dir + 'Sources/Public/AppCheckCore/*.h'
+
+  s.ios.weak_framework = 'DeviceCheck'
+  s.osx.weak_framework = 'DeviceCheck'
+  s.tvos.weak_framework = 'DeviceCheck'
+
+  s.dependency 'AppCheckCoreInterop', '~> 10.11'
+  s.dependency 'PromisesObjC', '~> 2.1'
+  s.dependency 'GoogleUtilities/Environment', '~> 7.8'
+
+  s.pod_target_xcconfig = {
+    'GCC_C_LANGUAGE_STANDARD' => 'c99',
+    'HEADER_SEARCH_PATHS' => '"${PODS_TARGET_SRCROOT}"'
+  }
+
+  s.test_spec 'unit' do |unit_tests|
+    unit_tests.platforms = {
+      :ios => ios_deployment_target,
+      :osx => osx_deployment_target,
+      :tvos => tvos_deployment_target
+    }
+    unit_tests.source_files = [
+      base_dir + 'Tests/Unit/**/*.[mh]',
+      base_dir + 'Tests/Utils/**/*.[mh]',
+    ]
+
+    unit_tests.resources = base_dir + 'Tests/Fixture/**/*'
+    unit_tests.dependency 'FirebaseCore', '~> 10.0'
+    unit_tests.dependency 'OCMock'
+    unit_tests.requires_app_host = true
+  end
+
+  s.test_spec 'integration' do |integration_tests|
+    integration_tests.platforms = {
+      :ios => ios_deployment_target,
+      :osx => osx_deployment_target,
+      :tvos => tvos_deployment_target
+    }
+    integration_tests.source_files = [
+      base_dir + 'Tests/Integration/**/*.[mh]',
+      base_dir + 'Tests/Integration/**/*.[mh]',
+    ]
+    integration_tests.resources = base_dir + 'Tests/Fixture/**/*'
+    integration_tests.dependency 'FirebaseCore', '~> 10.0'
+    integration_tests.dependency 'FirebaseCoreExtension', '~> 10.0'
+    integration_tests.requires_app_host = true
+  end
+
+  s.test_spec 'swift-unit' do |swift_unit_tests|
+    swift_unit_tests.platforms = {
+      :ios => ios_deployment_target,
+      :osx => osx_deployment_target,
+      :tvos => tvos_deployment_target
+    }
+    swift_unit_tests.source_files = [
+      base_dir + 'Tests/Unit/Swift/**/*.swift',
+      base_dir + 'Tests/Unit/Swift/**/*.h',
+    ]
+    swift_unit_tests.dependency 'FirebaseCore', '~> 10.0'
+  end
+
+end