changing appveyor build to stack-lts-12

PanAeon · PanAeon · commit 1c2ada7cb866 · 2019-03-06T14:27:29.000Z
diff --git a/appveyor.yml b/appveyor.yml
@@ -11,7 +11,7 @@ environment:
   STACK_VERSION: 1.9.3
 
   matrix:
-    - STACK_YAML: stack.yaml
+    - STACK_YAML: stack-lts-12.yaml
     - STACK_YAML: stack-lts-6.yaml
 
 install:
diff --git a/stack-lts-12.yaml b/stack-lts-12.yaml
@@ -4,6 +4,7 @@ packages:
   - dhall-bash
   - dhall-json
   - dhall-text
+  - dhall-lsp-server
 extra-deps:
   - megaparsec-7.0.3
   - repline-0.2.0.0
