Apply swift-format and lint fixes

Author: coenttb

Package.swift

@@ -1,16 +1,16 @@
-// swift-tools-version:6.2
+// swift-tools-version: 6.2
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
 
 let package = Package(
     name: "swift-cssom",
     platforms: [
-        .macOS(.v15),
-        .iOS(.v18),
-        .tvOS(.v18),
-        .watchOS(.v11),
-        .macCatalyst(.v18)
+        .macOS(.v26),
+        .iOS(.v26),
+        .tvOS(.v26),
+        .watchOS(.v26),
+        .visionOS(.v26),
     ],
     products: [
         .library(