Update meta to correspond to the published 1.2.2

Change-Id: I9dcbd9237d25948eb62e3ba68403436c64c70845
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/153822
Auto-Submit: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Jake Macdonald <jakemac@google.com>
Reviewed-by: Jake Macdonald <jakemac@google.com>

Author: bwilkerson

pkg/meta/CHANGELOG.md

@@ -1,6 +1,24 @@
 ## 1.3.0-nullsafety
 
 * Opt into null safety.
+
+## 1.2.2
+
+* Removed `unawaited` because the attempt to move it from `package:pedantic`
+  caused too many issues. If you see errors about `unawaited` being declared in
+  two places, please update the version constraints for `meta` to `1.2.2` or
+  later.
+
+## 1.2.1
+
+* Fixed a bug by adding an import of dart:async so that the code really is
+  compatible with the lower bound of the SDK constraints.
+
+## 1.2.0
+
+* Introduce `unawaited` to mark invocations that return a `Future` where it's
+  intentional that the future is not being awaited. (Moved from
+  `package:pedantic`.)
 * Introduce `@doNotStore` to annotate methods, getters and functions to
   indicate that values obtained by invoking them should not be stored in a
   field or top-level variable.

pkg/meta/lib/meta.dart

@@ -1,8 +1,9 @@
-// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2016, 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.
 
-/// Constants for use in metadata annotations.
+/// Annotations that developers can use to express the intentions that otherwise
+/// can't be deduced by statically analyzing the source code.
 ///
 /// See also `@deprecated` and `@override` in the `dart:core` library.
 ///
@@ -12,7 +13,7 @@
 /// function's name differently.
 ///
 /// For information on installing and importing this library, see the [meta
-/// package on pub.dev](https://pub.dev/packages/meta).  For examples of using
+/// package on pub.dev](https://pub.dev/packages/meta). For examples of using
 /// annotations, see
 /// [Metadata](https://dart.dev/guides/language/language-tour#metadata) in the
 /// language tour.

pkg/meta/pubspec.yaml

@@ -1,11 +1,11 @@
 name: meta
 version: 1.3.0-nullsafety
-author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/dart-lang/sdk/tree/master/pkg/meta
 description: >
- This library contains the definitions of annotations that provide additional
- semantic information about the program being annotated. These annotations are
- intended to be used by tools to provide a better user experience.
+ This library contains the declarations of annotations that developers can use
+ to express the intentions that otherwise can't be deduced by statically
+ analyzing the source code. These annotations are intended to be used by tools
+ to provide a better user experience.
 environment:
   # This must remain a tight constraint (only allow dev versions) until nnbd is
   # stable.