Merge branch 'stable-3.0' into stable-3.1

* stable-3.0:
  Upgrade bazlets to latest stable-3.0 to build with 3.0.10 API
  Upgrade bazlets to latest stable-2.16 to build with 2.16.21 API
  Upgrade bazlets to latest stable-2.15 to build with 2.15.19 API
  Upgrade bazlets to latest stable-2.14 to build with 2.14.21 API

Change-Id: If08e61d772b0d44ff9a556c16f4747d6e4d404c9
diff --git a/WORKSPACE b/WORKSPACE
index 9b66c1a..07f3ec7 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "928c928345646ae958b946e9bbdb462f58dd1384",
+    commit = "51c1fd2758fcc1b900a80d4ebb037bc373f85d39",
     #local_path = "/home/<user>/projects/bazlets",
 )