Update internacionalization.dart

Solves the problem with null safety

@@ -55,7 +55,7 @@ extension Trans on String {
     return i == 1 ? trArgs(args) : pluralKey!.trArgs(args);
     return i == 1 ? trArgs(args) : pluralKey!.trArgs(args);
   }
   }
 
 
-  String? trParams([Map<String, String> params = const {}]) {
+  String trParams([Map<String, String> params = const {}]) {
     var trans = tr;
     var trans = tr;
     if (params.isNotEmpty) {
     if (params.isNotEmpty) {
       params.forEach((key, value) {
       params.forEach((key, value) {
@@ -65,7 +65,7 @@ extension Trans on String {
     return trans;
     return trans;
   }
   }
 
 
-  String? trPluralParams(
+  String trPluralParams(
       [String? pluralKey, int? i, Map<String, String> params = const {}]) {
       [String? pluralKey, int? i, Map<String, String> params = const {}]) {
     return i == 1 ? trParams(params) : pluralKey!.trParams(params);
     return i == 1 ? trParams(params) : pluralKey!.trParams(params);
   }
   }