Expose CSQLite as a SPM product

Author: groue

Package.swift

@@ -37,6 +37,7 @@ let package = Package(
         .watchOS(.v4),
     ],
     products: [
+        .library(name: "CSQLite", targets: ["CSQLite"]),
         .library(name: "GRDB", targets: ["GRDB"]),
         .library(name: "GRDB-dynamic", type: .dynamic, targets: ["GRDB"]),
     ],