bump stack.yaml (the old resolver does not build any more).

fisx · fisx · commit 42a6e8b4d97f · 2019-06-15T10:59:56.000+02:00
diff --git a/stack.yaml b/stack.yaml
@@ -1,4 +1,4 @@
-resolver: lts-11.7
+resolver: lts-13.25
 packages:
 - '.'
 - example/
