Crashlytics add to subspec and Firebase.h (#4634)

CoreOnly/Sources/Firebase.h

@@ -26,6 +26,10 @@
     #import <FirebaseAuth/FirebaseAuth.h>
   #endif
 
+  #if __has_include(<FirebaseCrashlytics/FirebaseCrashlytics.h>)
+    #import <FirebaseCrashlytics/FirebaseCrashlytics.h>
+  #endif
+
   #if __has_include(<FirebaseDatabase/FirebaseDatabase.h>)
     #import <FirebaseDatabase/FirebaseDatabase.h>
   #endif

CoreOnly/Tests/FirebasePodTest/Podfile

@@ -13,6 +13,7 @@ target 'FirebasePodTest' do
   pod 'FirebaseCore', :path => '../../../'
   pod 'FirebaseCoreDiagnostics', :path => '../../../'
   pod 'FirebaseCoreDiagnosticsInterop', :path => '../../../'
+  pod 'FirebaseCrashlytics', :path => '../../../'
   pod 'FirebaseDatabase', :path => '../../../'
   pod 'FirebaseDynamicLinks', :path => '../../../'
   pod 'FirebaseFirestore', :path => '../../../'

Firebase.podspec

@@ -69,6 +69,11 @@ Simplify your iOS development, grow your user base, and monetize more effectivel
     ss.dependency 'FirebaseAuth', '~> 6.4.1'
   end
 
+  s.subspec 'Crashlytics' do |ss|
+    ss.dependency 'Firebase/CoreOnly'
+    ss.dependency 'FirebaseCrashlytics', '~> 4.0.0-beta.1'
+  end
+
   s.subspec 'Database' do |ss|
     ss.dependency 'Firebase/CoreOnly'
     ss.dependency 'FirebaseDatabase', '~> 6.1.3'