Support the latest SDK with pkg:dart_internal

Change-Id: Ife3c77834df9f781d447a7d3cbc842fb7e44be49
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/170140
Commit-Queue: Kevin Moore <kevmoo@google.com>
Reviewed-by: Bob Nystrom <rnystrom@google.com>
Reviewed-by: Nate Bosch <nbosch@google.com>
Auto-Submit: Kevin Moore <kevmoo@google.com>

Author: kevmoo

pkg/dart_internal/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.1.12-nullsafety.1
+
+- Support the latest Dart SDK.
+
 ## 0.1.10
 
 - Support the latest Dart SDK.

pkg/dart_internal/pubspec.yaml

@@ -1,7 +1,5 @@
 name: dart_internal
-version: 0.1.12-nullsafety
-author: "Dart Team <misc@dartlang.org>"
-homepage: http://www.dartlang.org
+version: 0.1.12-nullsafety.1
 repository: https://github.com/dart-lang/sdk/tree/master/pkg/dart_internal
 description: >
   This package is not intended for wide use. It provides a temporary API to
@@ -18,4 +16,4 @@ description: >
 environment:
   # Restrict the upper bound so that we can remove support for this in a later
   # version of the SDK without it being a breaking change.
-  sdk: ">=2.10.0-0 <2.11.0"
+  sdk: ">=2.10.0-0 <2.12.0"