Upgrade soy to 2019-10-08

Change-Id: I82e63bfc5b0f562040fff5e59e0043b9a3febc4d
diff --git a/WORKSPACE b/WORKSPACE
index fff66b9..9b003bc 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -142,8 +142,8 @@
 
 maven_jar(
     name = "soy",
-    artifact = "com.google.template:soy:2019-09-03",
-    sha1 = "40781da0302b4b5d53006dc8bd5a432c7288d807",
+    artifact = "com.google.template:soy:2019-10-08",
+    sha1 = "4518bf8bac2dbbed684849bc209c39c4cb546237",
 )
 
 maven_jar(