Use main branch on dependencies.

Author: rhx

Package.swift

@@ -6,9 +6,9 @@ let package = Package(
     name: "Gtk",
     products: [ .library(name: "Gtk", targets: ["Gtk"]) ],
     dependencies: [
-        .package(url: "https://github.com/rhx/gir2swift.git", branch: "development"),
-        .package(url: "https://github.com/rhx/SwiftAtk.git",  branch: "development"),
-        .package(url: "https://github.com/rhx/SwiftGdk.git",  branch: "development"),
+        .package(url: "https://github.com/rhx/gir2swift.git", branch: "main"),
+        .package(url: "https://github.com/rhx/SwiftAtk.git",  branch: "main"),
+        .package(url: "https://github.com/rhx/SwiftGdk.git",  branch: "main"),
         .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.0.0"),
     ],
     targets: [