Incrementing ios min version to 13

Author: pmurphyjam

Package.swift

@@ -6,7 +6,7 @@ import PackageDescription
 let package = Package(
     name: "SQLPackage",
     platforms: [.macOS(.v10_11),
-    .iOS(.v12),
+    .iOS(.v13),
     .tvOS(.v10),
     .watchOS(.v5)],
     products: [