Add mod to stack.yaml

Author: michaelpj

stack-8.6.5.yaml

@@ -106,6 +106,7 @@ extra-deps:
   - lsp-1.4.0.0
   - lsp-test-0.14.0.2
   - lsp-types-1.4.0.0
+  - mod-0.1.2.2
   - stm-containers-1.1.0.4
   - stm-hamt-1.2.0.6@sha256:fba86ccb4b45c5706c19b0e1315ba63dcac3b5d71de945ec001ba921fae80061,3972
   - primitive-extras-0.10.1