Update README.md (dart-lang/source_maps#69)

* Update README.md

* update the changelog
diff --git a/pkgs/source_maps/CHANGELOG.md b/pkgs/source_maps/CHANGELOG.md
index a282117..3665019 100644
--- a/pkgs/source_maps/CHANGELOG.md
+++ b/pkgs/source_maps/CHANGELOG.md
@@ -1,6 +1,7 @@
 # 0.10.11
 
 * Populate the pubspec `repository` field.
+* Update the source map documentation link in the readme.
 
 ## 0.10.10
 
diff --git a/pkgs/source_maps/README.md b/pkgs/source_maps/README.md
index 89e9eff..e81f278 100644
--- a/pkgs/source_maps/README.md
+++ b/pkgs/source_maps/README.md
@@ -26,5 +26,5 @@
     instance, if you have 2 tools that produce source maps and you call one with
     the result of the other.
 
-[closure]: http://code.google.com/p/closure-compiler/wiki/SourceMaps
+[closure]: https://github.com/google/closure-compiler/wiki/Source-Maps
 [spec]: https://docs.google.com/a/google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit
diff --git a/pkgs/source_maps/pubspec.yaml b/pkgs/source_maps/pubspec.yaml
index e32c278..eaaa46c 100644
--- a/pkgs/source_maps/pubspec.yaml
+++ b/pkgs/source_maps/pubspec.yaml
@@ -1,6 +1,6 @@
 name: source_maps
 version: 0.10.11
-description: Library to programmatically manipulate source map files.
+description: A library to programmatically manipulate source map files.
 repository: https://github.com/dart-lang/source_maps
 
 environment: