Format yaml files according to yamllint's requirements.

appveyor.yml

@@ -1,19 +1,16 @@
+---
 cache:
-- '%APPDATA%\cabal'
-- '%APPDATA%\ghc'
+  - '%APPDATA%\cabal'
+  - '%APPDATA%\ghc'
 
 install:
-- choco install ghc --version 8.2.2
-- refreshenv
+  - choco install ghc --version 8.2.2
+  - refreshenv
 
 build_script:
-- cabal update
-- cabal install alex happy
-- cabal install --enable-tests --enable-benchmarks --disable-documentation --only-dependencies
+  - cabal update
+  - cabal install alex happy
+  - cabal install --enable-tests --enable-benchmarks --disable-documentation --only-dependencies
 
 test_script:
-- cabal test
-
-branches:
-  only:
-  - master
+  - cabal test

stack.yaml

@@ -1,55 +1,56 @@
+---
 packages: [.]
 resolver: lts-6.27
 extra-deps:
-- HUnit-1.6.0.0
-- QuickCheck-2.11.3
-- aeson-1.4.0.0
-- aeson-compat-0.3.8
-- attoparsec-0.13.2.2
-- attoparsec-iso8601-1.0.0.0
-- base-compat-0.10.4
-- base-orphans-0.5.4
-- bifunctors-5.5.3
-- binary-orphans-0.1.8.0
-- bsb-http-chunked-0.0.0.2
-- bytestring-builder-0.10.8.1.0
-- cabal-doctest-1.0.6
-- case-insensitive-1.2.0.11
-- cpphs-1.20.8
-- exceptions-0.8.3
-- fast-logger-2.4.11
-- github-0.19
-- hspec-2.5.5
-- hspec-core-2.5.5
-- hspec-discover-2.5.5
-- hspec-expectations-0.8.2
-- http-api-data-0.3.8.1
-- http-media-0.7.1.2
-- http-types-0.12.1
-- mmorph-1.1.2
-- natural-transformation-0.4
-- network-2.7.0.2
-- parsec-3.1.13.0
-- quickcheck-io-0.2.0
-- resourcet-1.1.11
-- safe-0.3.17
-- semigroupoids-5.2.1
-- semigroups-0.18.5
-- servant-0.13.0.1
-- servant-server-0.13.0.1
-- singleton-bool-0.1.4
-- split-0.2.3.3
-- string-conversions-0.4.0.1
-- tagged-0.8.6
-- text-1.2.3.0
-- th-abstraction-0.2.8.0
-- transformers-compat-0.5.1.4
-- unix-compat-0.5.0.1
-- unix-time-0.3.8
-- unliftio-core-0.1.1.0
-- vault-0.3.1.1
-- vector-binary-instances-0.2.4
-- vector-instances-3.4
-- wai-extra-3.0.22.0
-- warp-3.2.23
-- word8-0.1.3
+  - HUnit-1.6.0.0
+  - QuickCheck-2.11.3
+  - aeson-1.4.0.0
+  - aeson-compat-0.3.8
+  - attoparsec-0.13.2.2
+  - attoparsec-iso8601-1.0.0.0
+  - base-compat-0.10.4
+  - base-orphans-0.5.4
+  - bifunctors-5.5.3
+  - binary-orphans-0.1.8.0
+  - bsb-http-chunked-0.0.0.2
+  - bytestring-builder-0.10.8.1.0
+  - cabal-doctest-1.0.6
+  - case-insensitive-1.2.0.11
+  - cpphs-1.20.8
+  - exceptions-0.8.3
+  - fast-logger-2.4.11
+  - github-0.19
+  - hspec-2.5.5
+  - hspec-core-2.5.5
+  - hspec-discover-2.5.5
+  - hspec-expectations-0.8.2
+  - http-api-data-0.3.8.1
+  - http-media-0.7.1.2
+  - http-types-0.12.1
+  - mmorph-1.1.2
+  - natural-transformation-0.4
+  - network-2.7.0.2
+  - parsec-3.1.13.0
+  - quickcheck-io-0.2.0
+  - resourcet-1.1.11
+  - safe-0.3.17
+  - semigroupoids-5.2.1
+  - semigroups-0.18.5
+  - servant-0.13.0.1
+  - servant-server-0.13.0.1
+  - singleton-bool-0.1.4
+  - split-0.2.3.3
+  - string-conversions-0.4.0.1
+  - tagged-0.8.6
+  - text-1.2.3.0
+  - th-abstraction-0.2.8.0
+  - transformers-compat-0.5.1.4
+  - unix-compat-0.5.0.1
+  - unix-time-0.3.8
+  - unliftio-core-0.1.1.0
+  - vault-0.3.1.1
+  - vector-binary-instances-0.2.4
+  - vector-instances-3.4
+  - wai-extra-3.0.22.0
+  - warp-3.2.23
+  - word8-0.1.3