Fix NIOSSL deprecation warnings

- Package.swift had the `NIOSSL` package raised to 2.14.1 from the previous 2.12.0.
- All instances of `TLSConfiguration.forClient` have been replaced with `TLSConfiguration.makeClientConfiguration`

Co-authored-by: Fabian Fett <fabianfett@apple.com>

Package.swift

@@ -14,7 +14,7 @@ let package = Package(
     ],
     dependencies: [
         .package(url: "https://github.com/apple/swift-nio.git", from: "2.32.0"),
-        .package(url: "https://github.com/apple/swift-nio-ssl.git", from: "2.12.0"),
+        .package(url: "https://github.com/apple/swift-nio-ssl.git", from: "2.14.1"),
         .package(url: "https://github.com/apple/swift-crypto.git", from: "1.0.0"),
         .package(url: "https://github.com/apple/swift-metrics.git", from: "2.0.0"),
         .package(url: "https://github.com/apple/swift-log.git", from: "1.4.0"),

Tests/IntegrationTests/PostgresNIOTests.swift

@@ -680,7 +680,7 @@ final class PostgresNIOTests: XCTestCase {
         var conn: PostgresConnection?
         XCTAssertNoThrow(conn = try PostgresConnection.connect(
             to: SocketAddress.makeAddressResolvingHost("elmer.db.elephantsql.com", port: 5432),
-            tlsConfiguration: .forClient(certificateVerification: .none),
+            tlsConfiguration: .makeClientConfiguration(),
             serverHostname: "elmer.db.elephantsql.com",
             on: eventLoop
         ).wait())
@@ -709,7 +709,7 @@ final class PostgresNIOTests: XCTestCase {
         XCTAssertThrowsError(
             try PostgresConnection.connect(
                 to: SocketAddress.makeAddressResolvingHost("elmer.db.elephantsql.com", port: 5432),
-                tlsConfiguration: .forClient(certificateVerification: .fullVerification),
+                tlsConfiguration: .makeClientConfiguration(),
                 serverHostname: "34.228.73.168",
                 on: eventLoop
             ).wait()

Tests/PostgresNIOTests/New/PSQLChannelHandlerTests.swift

@@ -34,7 +34,7 @@ class PSQLChannelHandlerTests: XCTestCase {
 
     func testEstablishSSLCallbackIsCalledIfSSLIsSupported() {
         var config = self.testConnectionConfiguration()
-        config.tlsConfiguration = .forClient(certificateVerification: .none)
+        config.tlsConfiguration = .makeClientConfiguration()
         var addSSLCallbackIsHit = false
         let handler = PSQLChannelHandler(authentification: config.authentication) { channel in
             addSSLCallbackIsHit = true
@@ -72,7 +72,7 @@ class PSQLChannelHandlerTests: XCTestCase {
 
     func testSSLUnsupportedClosesConnection() {
         var config = self.testConnectionConfiguration()
-        config.tlsConfiguration = .forClient()
+        config.tlsConfiguration = .makeClientConfiguration()
 
         let handler = PSQLChannelHandler(authentification: config.authentication) { channel in
             XCTFail("This callback should never be exectuded")