Bump bazlets version to 50f43f450f

Depends-On: https://gerrit-review.googlesource.com/c/bazlets/+/403857
Change-Id: Iabb56521e55353e9fd3911b4ec48529a9f6ce13f

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index 422be95..60aacfb 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -12,7 +12,7 @@
 load("//tools:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "e68cc7a45d9ee2b100024b9b12533b50a4598585",
+    commit = "50f43f450f2178425b26d5b2a2442ac3acd07f37",
     # local_path = "/home/<user>/projects/bazlets",
 )