require macOS 10.11 because SwiftFormat does.

mattpolzin · mattpolzin · commit b76aaa6a3e63 · 2022-10-23T18:47:38.000-05:00
diff --git a/Package.swift b/Package.swift
@@ -4,6 +4,9 @@ import PackageDescription
 
 let package = Package(
     name: "JSONAPI-OpenAPI",
+    platforms: [
+        .macOS(.v10_11),
+    ],
     products: [
         .library(
             name: "JSONAPIOpenAPI",
