Merge branch 'djbe-bugfix/xcode-12' into master

Package.swift

@@ -2,6 +2,13 @@
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 import PackageDescription
 
+// Starting with Xcode 12, we don't need to depend on our own libxml2 target
+#if swift(>=5.3) && !os(Linux)
+let dependencies: [Target.Dependency] = []
+#else
+let dependencies: [Target.Dependency] = ["libxml2"]
+#endif
+
 #if swift(>=5.2) && !os(Linux)
 let pkgConfig: String? = nil
 #else
@@ -33,7 +40,7 @@ let package = Package(
         ),
         .target(
             name: "Kanna",
-            dependencies: ["libxml2"],
+            dependencies: dependencies,
             path: "Sources",
             exclude: [
                 "Sources/Info.plist",