bump stack resolver to lts-13

simonmichael · simonmichael · commit afcd6845650e · 2019-01-17T09:56:04.000-08:00
diff --git a/stack.yaml b/stack.yaml
@@ -1,4 +1,4 @@
-resolver: lts-12.0
+resolver: lts-13.0
 
 packages:
 - '.'
