Merge branch 'release/4.0.0' of github.com:Leanplum/Leanplum-iOS-SDK into release/4.0.0

Author: nzagorchev

Package.swift

@@ -10,8 +10,8 @@ let package = Package(
     targets: [
         .binaryTarget(
             name: "Leanplum",
-            url: "github/Leanplum.xcframework.zip",
-            checksum: "checksum"
+            url: "https://github.com/Leanplum/Leanplum-iOS-SDK/releases/download/4.0.0-beta12/Leanplum.xcframework.zip",
+            checksum: "d7be1fd67ac8cc0bf87bff2907e1e51e3ae3fe40633b1bf768bc8df6080d3bd1"
         ),
        .target(
            name: "LeanplumLocation",