Merge the dart:uri library into dart:core and update the Uri class

sdk/lib/_internal/pub/lib/src/command_lish.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library command_lish;
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:json';
-import 'dart:uri';
 
 import 'package:args/args.dart';
 import 'package:http/http.dart' as http;
 import 'package:pathos/path.dart' as path;
 
 import 'command.dart';
 import 'directory_tree.dart';
 import 'exit_codes.dart' as exit_codes;
 import 'git.dart' as git;
 import 'hosted_source.dart';
@@ skipping 141 matching lines @@
       return confirm(message).then((confirmed) {
         if (!confirmed) {
           log.error("Package upload canceled.");
           return false;
         }
         return true;
       });
     });
   }
 }