Use tkf/julia-code-style-suggesters@v1 (#18)

Author: tkf

.JuliaFormatter.toml

@@ -0,0 +1 @@
+always_for_in = true

.github/workflows/ci.yml

@@ -31,10 +31,17 @@ jobs:
           flags: Pkg.test
           name: codecov-umbrella
 
+  # https://github.com/tkf/julia-code-style-suggesters
+  code-style:
+    if: always() && github.event.pull_request
+    runs-on: ubuntu-latest
+    steps:
+      - uses: tkf/julia-code-style-suggesters@v1
+
   # A job that succeeds if and only if all jobs succeed.
   all-success:
     if: always() && github.event.pull_request
-    needs: test
+    needs: [test, code-style]
     runs-on: ubuntu-latest
     steps:
       # https://github.com/tkf/merge-conclusions-action