`0.1.5` CHANGELOG update pre-publish.

Adds:
* FilePackagesDirectoryPackages.getBase(..)` performance improvements.

BUG=
R=scheglov@google.com

Review URL: https://codereview.chromium.org//2051143002 .

pkgs/package_config/CHANGELOG.md

diff --git a/pkgs/package_config/CHANGELOG.md b/pkgs/package_config/CHANGELOG.md
index 6ac42ec..b7b441e 100644
--- a/pkgs/package_config/CHANGELOG.md
+++ b/pkgs/package_config/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.1.5
+
+- `FilePackagesDirectoryPackages.getBase(..)` performance improvements.
+
 ## 0.1.4
 
 - Strong mode fixes.

pkgs/package_config/codereview.settings

diff --git a/pkgs/package_config/codereview.settings b/pkgs/package_config/codereview.settings
new file mode 100644
index 0000000..1099f05
--- /dev/null
+++ b/pkgs/package_config/codereview.settings
@@ -0,0 +1,3 @@
+CODE_REVIEW_SERVER: https://codereview.chromium.org/
+VIEW_VC: https://github.com/dart-lang/package_config/commit/
+CC_LIST: reviews@dartlang.org