Bump sky pub version to -7

sky/sdk/packages/sky/pubspec.yaml

diff --git a/sky/sdk/packages/sky/pubspec.yaml b/sky/sdk/packages/sky/pubspec.yaml
index bb4e1aa..0c22190 100644
--- a/sky/sdk/packages/sky/pubspec.yaml
+++ b/sky/sdk/packages/sky/pubspec.yaml
@@ -2,6 +2,6 @@
 author: Chromium Authors <sky-dev@googlegroups.com>
 description: Dart files to support executing inside Sky.
 homepage: https://github.com/domokit/mojo/tree/master/sky
-version: 0.0.5+dart-summit-6
+version: 0.0.5+dart-summit-7
 dependencies:
   mojo: '>=0.0.1 <1.0.0'