Add NIOSSL dependency (#74)

We want to enable TLS Redis Connections out of the box. For this to work we need to link NIOSSL. This patch just adds the dependency. Most of our adopters have NIOSSL very likely in their dependency graph anyway.

Author: fabianfett

Package.swift

@@ -27,6 +27,7 @@ let package = Package(
         .package(url: "https://github.com/apple/swift-log.git", from: "1.0.0"),
         .package(url: "https://github.com/apple/swift-metrics.git", "1.0.0" ..< "3.0.0"),
         .package(url: "https://github.com/apple/swift-nio.git", from: "2.43.0"),
+        .package(url: "https://github.com/apple/swift-nio-ssl.git", from: "2.23.1"),
     ],
     targets: [
         .target(
@@ -36,6 +37,7 @@ let package = Package(
                 .product(name: "NIOPosix", package: "swift-nio"),
                 .product(name: "NIO", package: "swift-nio"),
                 .product(name: "NIOConcurrencyHelpers", package: "swift-nio"),
+                .product(name: "NIOSSL", package: "swift-nio-ssl"),
                 .product(name: "Atomics", package: "swift-atomics"),
                 .product(name: "Logging", package: "swift-log"),
                 .product(name: "Metrics", package: "swift-metrics")