fix(macos): define swift_package

Author: MichaelVerdon

packages/cloud_firestore/cloud_firestore/macos/cloud_firestore/Package.swift

@@ -112,6 +112,7 @@ 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/macos/firebase_app_check/Package.swift

@@ -111,6 +111,7 @@ 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/macos/firebase_auth/Package.swift

@@ -112,6 +112,7 @@ 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/macos/firebase_crashlytics/Package.swift

@@ -116,6 +116,7 @@ let package = Package(
         .headerSearchPath("include"),
         .define("LIBRARY_VERSION", to: "\"\(library_version)\""),
         .define("LIBRARY_NAME", to: "\"flutter-fire-cls\""),
+        .define("SWIFT_PACKAGE"),
       ]
     ),
   ]

packages/firebase_database/firebase_database/macos/firebase_database/Package.swift

@@ -111,6 +111,7 @@ let package = Package(
         .headerSearchPath("include"),
         .define("LIBRARY_VERSION", to: "\"\(library_version)\""),
         .define("LIBRARY_NAME", to: "\"flutter-fire-rtdb\""),
+        .define("SWIFT_PACKAGE"),
       ]
     ),
   ]