fix: swift integ

Author: MichaelVerdon

packages/cloud_firestore/cloud_firestore/ios/cloud_firestore/Package.swift

@@ -110,6 +110,7 @@ let package = Package(
         .headerSearchPath("include/cloud_firestore/Public"),
         .define("LIBRARY_VERSION", to: "\"\(library_version)\""),
         .define("LIBRARY_NAME", to: "\"flutter-fire-fst\""),
+        .define("SWIFT_PACKAGE"),
       ]
     ),
   ]

packages/firebase_app_check/firebase_app_check/ios/firebase_app_check/Package.swift

@@ -109,6 +109,7 @@ let package = Package(
         .headerSearchPath("include"),
         .define("LIBRARY_VERSION", to: "\"\(library_version)\""),
         .define("LIBRARY_NAME", to: "\"flutter-fire-appcheck\""),
+        .define("SWIFT_PACKAGE"),
       ]
     ),
   ]

packages/firebase_auth/firebase_auth/ios/firebase_auth/Package.swift

@@ -110,6 +110,7 @@ let package = Package(
         .headerSearchPath("include/firebase_auth/Public"),
         .define("LIBRARY_VERSION", to: "\"\(library_version)\""),
         .define("LIBRARY_NAME", to: "\"flutter-fire-auth\""),
+        .define("SWIFT_PACKAGE"),
       ]
     ),
   ]

packages/firebase_crashlytics/firebase_crashlytics/ios/firebase_crashlytics/Package.swift

@@ -114,6 +114,7 @@ let package = Package(
         .headerSearchPath("include"),
         .define("LIBRARY_VERSION", to: "\"\(library_version)\""),
         .define("LIBRARY_NAME", to: "\"flutter-fire-cls\""),
+        .define("SWIFT_PACKAGE"),
       ]
     ),
   ]

packages/firebase_in_app_messaging/firebase_in_app_messaging/ios/firebase_in_app_messaging/Package.swift

@@ -115,6 +115,7 @@ let package = Package(
         .headerSearchPath("include"),
         .define("LIBRARY_VERSION", to: "\"\(library_version)\""),
         .define("LIBRARY_NAME", to: "\"flutter-fire-fiam\""),
+        .define("SWIFT_PACKAGE"),
       ]
     ),
   ]

packages/firebase_messaging/firebase_messaging/ios/firebase_messaging/Package.swift

@@ -114,6 +114,7 @@ let package = Package(
         .headerSearchPath("include"),
         .define("LIBRARY_VERSION", to: "\"\(library_version)\""),
         .define("LIBRARY_NAME", to: "\"flutter-fire-fcm\""),
+        .define("SWIFT_PACKAGE"),
       ]
     ),
   ]