Sort and lock npm packages.

Use a specific version for every dependency to avoid breakages due to
drift.

Change-Id: Ibcf75528fecd207ee12863d92bbfff2f36d035e2
Signed-off-by: Alex Perry <alex.perry96@gmail.com>
diff --git a/WORKSPACE b/WORKSPACE
index acda914..398202c 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -752,7 +752,7 @@
 # I'm sure there is a better path, but that works...
 yarn_install(
     name = "npm",
-    frozen_lockfile = False,
+    frozen_lockfile = True,
     package_json = "//:package.json",
     symlink_node_modules = False,
     yarn_lock = "//:yarn.lock",