Merge branch 'stable-2.15' into stable-2.16

* stable-2.15:
  Switch required bazel version to 0.29.1
  Bump required bazel version to 1.0.0rc2

Change-Id: I1a7b692f6557ccec2fd5fa55f5aeab68800d0f0a
diff --git a/.bazelversion b/.bazelversion
index 09d1d01..25939d3 100644
--- a/.bazelversion
+++ b/.bazelversion
@@ -1,2 +1 @@
-0.29.0
-
+0.29.1