Merge branch 'stable-3.1'

* stable-3.1:
  Bump Bazel version to 3.5.0
  Fix NullPointerExceptions

Change-Id: I73edc6d27076f241d49bbd169836a16216886783
diff --git a/WORKSPACE b/WORKSPACE
index 9c6cb5d..16483fd 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "3f9dadc615dc4053369a42d9ada37dafd8d4763c",
+    commit = "0f81174e3d1b892a1342ebc75bb4bbb158ae0efe",
     #local_path = "/home/<user>/projects/bazlets",
 )