test(tools): enable fourmolu in ci

.github/workflows/test.yml

@@ -110,6 +110,8 @@ jobs:
         run: ( ( which fortitude ) || ( ( which brew &&  brew install fortitude ) || ( which pipx && pipx install fortitude-lint ) ) || ( echo "Unable to install tool" ) )
       - name: fortran-linter
         run: ( ( which fortran-linter ) || ( ( which brew &&  brew install fprettify ) || ( which pipx && pipx install fortran-linter ) ) || ( echo "Unable to install tool" ) )
+      - name: fourmolu
+        run: ( ( which fourmolu ) || ( ( which brew &&  brew install fourmolu ) || ( which stack && stack install fourmolu ) || ( which cabal && cabal install fourmolu ) ) || ( echo "Unable to install tool" ) )
       - name: fprettify
         run: ( ( which fprettify ) || ( ( which brew &&  brew install fprettify ) || ( which pipx && pipx install fprettify ) ) || ( echo "Unable to install tool" ) )
       - name: gofumpt

CHANGELOG.md

@@ -4,6 +4,7 @@ All notable changes to this project will be documented in this file. Dates are d
 
 #### [Unreleased](https://github.com/hougesen/mdsf/compare/v0.8.2...HEAD)
 
+- test: validate completion command writes to stdout [`#856`](https://github.com/hougesen/mdsf/pull/856)
 - refactor(cache-prune): indicate if command failed [`#855`](https://github.com/hougesen/mdsf/pull/855)
 - ci: install homebrew [`#853`](https://github.com/hougesen/mdsf/pull/853)
 - test: caching works [`#854`](https://github.com/hougesen/mdsf/pull/854)

tools/fourmolu/plugin.json

@@ -15,7 +15,6 @@
     }
   },
   "description": "A formatter for Haskell source code",
-  "disable_ci_package_install": true,
   "homepage": "https://github.com/fourmolu/fourmolu",
   "languages": ["haskell"],
   "packages": {