Update stylish haskell config; apply all; add CI config (#1299)

* Update config default; Copy non-defaults

* Update .stylish-haskell config version to match pgrst

* Apply stylish haskell to all files

* CircleCI config

* Remove redundant import.

What is used from Network.HTTP.Types.Headers is also exported by Network.HTTP.Types.

* Grouped imports

* Show un-styled files on CircleCI failure

* Fix styling imports

* Apply adhoc standard correctly

.circleci/config.yml

@@ -77,7 +77,7 @@ jobs:
             sudo apt-get install -y postgresql-client
             stack setup
             rm -rf $(stack path --dist-dir) $(stack path --local-install-root)
-            stack install hlint packdeps cabal-install
+            stack install hlint packdeps cabal-install stylish-haskell
       - run:
           name: build src and tests
           command: |
@@ -91,6 +91,9 @@ jobs:
       - run:
           name: run linter
           command: git ls-files | grep '\.l\?hs$' | xargs stack exec -- hlint -X QuasiQuotes -X NoPatternSynonyms "$@"
+      - run:
+          name: run styler
+          command: git ls-files | grep '\.l\?hs$' | xargs stack exec -- stylish-haskell -i && git diff-index --exit-code HEAD --
       - save_cache:
           paths:
             - "~/.stack"