Bump bazel version to 1.0.0

Change-Id: I56c6ca02ddf410f598bd39821ca3e5b352d5f45f
diff --git a/.bazelversion b/.bazelversion
index 25939d3..3eefcb9 100644
--- a/.bazelversion
+++ b/.bazelversion
@@ -1 +1 @@
-0.29.1
+1.0.0