Bump Bazel version to 2.0.0

Change-Id: Ic16bf6e3e2d84f8624fb7ca066b3f63bff4fc4ae
diff --git a/.bazelversion b/.bazelversion
index 3eefcb9..227cea2 100644
--- a/.bazelversion
+++ b/.bazelversion
@@ -1 +1 @@
-1.0.0
+2.0.0