Bump Swift version

Author: Pattio

.github/workflows/ci.yml

@@ -14,5 +14,9 @@ jobs:
       - name: Check out code
         uses: actions/checkout@v4
 
+      - uses: swift-actions/setup-swift@v2
+        with:
+          swift-version: "6.0"
+
       - name: Run tests
         run: swift test --parallel

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version: 5.9
+// swift-tools-version: 6.0
 
 import PackageDescription