Re-add supported platforms

Package.resolved

@@ -0,0 +1,14 @@
+{
+  "pins" : [
+    {
+      "identity" : "tree-sitter",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/tree-sitter/tree-sitter",
+      "state" : {
+        "revision" : "98be227227af10cc7a269cb3ffb23686c0610b17",
+        "version" : "0.20.9"
+      }
+    }
+  ],
+  "version" : 2
+}

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version: 5.8
+// swift-tools-version: 5.9
 
 import PackageDescription
 
@@ -8,6 +8,14 @@ let settings: [SwiftSetting] = [
 
 let package = Package(
 	name: "SwiftTreeSitter",
+    platforms: [
+        .macOS(.v10_13),
+        .macCatalyst(.v13),
+        .iOS(.v12),
+        .tvOS(.v12),
+        .watchOS(.v5),
+        .visionOS(.v1),
+    ],
 	products: [
 		.library(name: "SwiftTreeSitter", targets: ["SwiftTreeSitter"]),
 		.library(name: "SwiftTreeSitterLayer", targets: ["SwiftTreeSitterLayer"]),