Add stack file for testing with the cffi flag disabled

bergmark · bergmark · commit 3ba2affe4d92 · 2017-03-18T10:03:23.000+01:00
diff --git a/stack-pure-unescape.yaml b/stack-pure-unescape.yaml
@@ -0,0 +1,7 @@
+resolver: lts-8.1
+packages:
+- '.'
+flags:
+  aeson:
+    fast: true
+    cffi: false
