chore: dart format, make a private field final

packages/at_lookup/lib/src/util/secure_socket_util.dart

@@ -3,7 +3,8 @@ import 'package:at_commons/at_commons.dart';
 import 'package:at_utils/at_logger.dart' show AtSignLogger;
 
 class SecureSocketUtil {
-  static AtSignLogger _logger = AtSignLogger('SecureSocketUtil');
+  static final AtSignLogger _logger = AtSignLogger('SecureSocketUtil');
+
   ///method that creates and returns a [SecureSocket]. If [decryptPackets] is set to true,the TLS keys are logged into a file.
   static Future<SecureSocket> createSecureSocket(
       String host, String port, SecureSocketConfig secureSocketConfig) async {
@@ -36,7 +37,8 @@ class SecureSocketUtil {
           throw AtException(
               'decryptPackets set to true but path to trusted certificated not provided');
         }
-        SecureSocket aSecureSocket = await SecureSocket.connect(host, int.parse(port),
+        SecureSocket aSecureSocket = await SecureSocket.connect(
+            host, int.parse(port),
             context: securityContext,
             keyLog: (line) =>
                 keysFile?.writeAsStringSync(line, mode: FileMode.append));