Upgrade soy to 2019-03-11

Change-Id: Ia4c84a87d4abc1abfab0e3c836da4ac369565673

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index 9cdf2df..f4726a7 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -130,8 +130,8 @@
 
 maven_jar(
     name = "soy",
-    artifact = "com.google.template:soy:2018-03-14",
-    sha1 = "76a1322705ba5a6d6329ee26e7387417725ce4b3",
+    artifact = "com.google.template:soy:2019-03-11",
+    sha1 = "119ac4b3eb0e2c638526ca99374013965c727097",
 )
 
 maven_jar(