Lint and check for restrictive package locks on ci

circle.yml

@@ -4,3 +4,7 @@ machine:
     - createdb -O postgrest_test -U ubuntu postgrest_test
   ghc:
     version: 7.8.3
+test:
+  post:
+    - cabal exec hlint src/*.hs test/**/*.hs
+    - cabal exec packdeps postgrest.cabal

postgrest.cabal

@@ -78,6 +78,7 @@ Test-Suite spec
                      , hasql == 0.7.*, hasql-backend
                      , hasql-postgres == 0.10.*
                      , warp >= 3.0.2, wai >= 3.0.1
+                     , packdeps, hlint
                      , HTTP, convertible
                      , case-insensitive
                      , wai-extra, wai-cors, containers