Add platform versions to the SPM manifest

Author: calvincestari

Package.swift

@@ -3,6 +3,12 @@ import PackageDescription
 
 let package = Package(
     name: "SQLite.swift",
+    platforms: [
+        .iOS(.v9),
+        .macOS(.v10_15),
+        .watchOS(.v3),
+        .tvOS(.v9)
+    ],
     products: [
         .library(
             name: "SQLite",
@@ -46,6 +52,12 @@ package.dependencies = [.package(url: "https://github.com/stephencelis/CSQLite.g
 package.targets = [
     .target(
         name: "SQLite",
+        platforms: [
+            .iOS(.v9),
+            .macOS(.v10_15),
+            .watchOS(.v3),
+            .tvOS(.v9)
+        ],
         dependencies: [.product(name: "CSQLite", package: "CSQLite")],
         exclude: ["Extensions/FTS4.swift", "Extensions/FTS5.swift"]
     ),