Upgrade bazlets to latest stable-3.0

Includes further fixes for --incompatible_disallow_legacy_java_provider.

Change-Id: I22c849eb0902b7396cfdd06c51e8f99b38cb755e

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index c59c513..623f607 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "631205bc4f7903d3cf656a844cab2bfd6b03f246",
+    commit = "0ca51936ca46049cddd34e971a595d3baafe731b",
     #local_path = "/home/<user>/projects/bazlets",
 )