drop support for swift 5

Author: alexdeem

.github/workflows/ci.yml

@@ -31,13 +31,3 @@ jobs:
       with:
         fail_ci_if_error: true
         verbose: true
-  build-swift-5-10:
-    runs-on: macos-14
-    steps:
-    - uses: actions/checkout@v4
-      with:
-        submodules: recursive
-    - name: Check Swift version
-      run: swift --version
-    - name: Build
-      run: swift build

.swift-version

@@ -1 +1 @@
-5.10
+6.0