Merge branch 'stable-2.13' into stable-2.14

* stable-2.13:
  Deprecate plugin

Change-Id: I556554a60bfd6f979a9ccfe151bd4f39ba6aea4b

.buckconfig

diff --git a/.buckconfig b/.buckconfig
index 4c18a27..b9cd14f 100644
--- a/.buckconfig
+++ b/.buckconfig
@@ -5,6 +5,8 @@
 
 [java]
   src_roots = java, resources
+  source_level = 8
+  target_level = 8
 
 [project]
   ignore = .git