Switch pkg packages, pub, and dartdoc to use package: imports.

utils/pub/command_lish.dart

Index: utils/pub/command_lish.dart
diff --git a/utils/pub/command_lish.dart b/utils/pub/command_lish.dart
index 84afdc03a1e25e6f38a76a43a245d8d22e588e3f..0181f04ddcad1ac84ef0b4b19c3028a78514a5b7 100644
--- a/utils/pub/command_lish.dart
+++ b/utils/pub/command_lish.dart
@@ -9,9 +9,10 @@ import 'dart:io';
 import 'dart:json';
 import 'dart:uri';
 
-import '../../pkg/args/lib/args.dart';
-import '../../pkg/http/lib/http.dart' as http;
-import '../../pkg/pathos/lib/path.dart' as path;
+import 'package:args/args.dart';
+import 'package:http/http.dart' as http;
+import 'package:pathos/path.dart' as path;
+
 import 'directory_tree.dart';
 import 'exit_codes.dart' as exit_codes;
 import 'git.dart' as git;