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

pkg/scheduled_test/test/scheduled_process_test.dart

Index: pkg/scheduled_test/test/scheduled_process_test.dart
diff --git a/pkg/scheduled_test/test/scheduled_process_test.dart b/pkg/scheduled_test/test/scheduled_process_test.dart
index 66b288f6ce63859e3ff01b83d85630bcd1ba27dd..974294737f543ec419a885ae34df0d48acd584da 100644
--- a/pkg/scheduled_test/test/scheduled_process_test.dart
+++ b/pkg/scheduled_test/test/scheduled_process_test.dart
@@ -7,10 +7,10 @@ library scheduled_process_test;
 import 'dart:async';
 import 'dart:io';
 
-import '../../../pkg/pathos/lib/path.dart' as path;
-import '../lib/scheduled_process.dart';
-import '../lib/scheduled_test.dart';
-import '../lib/src/mock_clock.dart' as mock_clock;
+import 'package:pathos/path.dart' as path;
+import 'package:scheduled_test/scheduled_process.dart';
+import 'package:scheduled_test/scheduled_test.dart';
+import 'package:scheduled_test/src/mock_clock.dart' as mock_clock;
 
 import 'metatest.dart';
 import 'utils.dart';