Merge branch 'stable-3.1'

* stable-3.1:
  Bump Bazel version to 3.4.1
  e2e-tests: Replace hardcoded scheme with property

Change-Id: I220a2f370f19f448411698bc0a4c9c521dafdf81

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index d170442..f717e84 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "b6cb89690a5e06261932eb30c95fd8db34a7943a",
+    commit = "74f9d8e76d5014d218ae6fe55127a5288c9a32c3",
     #local_path = "/home/<user>/projects/bazlets",
 )