Bump xcode version for CI (#131)

Co-authored-by: Brandon Sneed <[email protected]>

Author: bsneed

.github/workflows/swift.yml

@@ -20,7 +20,7 @@ jobs:
     steps:
     - uses: maxim-lobanov/setup-xcode@v1
       with:
-        xcode-version: '13.0'
+        xcode-version: '13.2.1'
     - uses: actions/checkout@v2
     - uses: webfactory/[email protected]
       with: