chore: fix License, CI, readme and gitignore

.github/workflows/ci.yml

@@ -15,13 +15,13 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Set up Go 1.22
-        uses: actions/setup-go@v4
+      - name: Set up Go
+        uses: actions/setup-go@v5
         with:
-          go-version: '1.22'
+          go-version: stable
       - name: Run test
         run: go test -v ./...
       - name: Run golangci-lint
-        uses: golangci/golangci-lint-action@v3
+        uses: golangci/golangci-lint-action@v4
         with:
-          version: v1.54
+          version: v1.56

.gitignore

@@ -0,0 +1,2 @@
+.idea/
+copyloopvar

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2023 karamaru
+Copyright (c) 2023-2024 karamaru
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -1,9 +1,11 @@
-## copyloopvar
+# copyloopvar
+
 copyloopvar is a linter detects places where loop variables are copied.
 
 cf. [Fixing For Loops in Go 1.22](https://go.dev/blog/loopvar-preview)
 
 ## Example
+
 ```go
 for i, v := range []int{1, 2, 3} {
     i := i // It's unnecessary to copy the loop variable "i"
@@ -18,6 +20,7 @@ for i := 1; i <= 3; i++ {
 ```
 
 ## Install
+
 ```bash
 go install github.com/karamaru-alpha/copyloopvar/cmd/copyloopvar
 go vet -vettool=`which copyloopvar` ./...