fix: update dependencies in yarn.lock (angular#4988)

Author: Brocco

CONTRIBUTING.md

@@ -180,7 +180,6 @@ Must be one of the following:
 * **perf**: A code change that improves performance
 * **test**: Adding missing tests or correcting existing tests
 * **build** Changes that affect the build system, CI configuration or external dependencies (example scopes: gulp, broccoli, npm)
-* **chore**: Other changes that don't modify `src` or `test` files
 
 ### Scope
 The scope could be anything specifying place of the commit change. For example