feat: Unify and update the setup- go and checkout in the action operation to the latest version

.github/workflows/codecov.yml

@@ -18,13 +18,13 @@ jobs:
     steps:
 
       - name: Set up Go 1.21
-        uses: actions/setup-go@v1
+        uses: actions/setup-go@v5
         with:
           go-version: '1.21'
         id: go
 
       - name: Check out code into the Go module directory
-        uses: actions/checkout@v1
+        uses: actions/checkout@v4
 
       - name: Get dependencies
         run: |

.github/workflows/goci.yml

@@ -16,10 +16,10 @@ jobs:
     name: run
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set up Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version: '1.21'
 

.github/workflows/golangci-lint.yml

@@ -15,11 +15,11 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/setup-go@v4
+      - uses: actions/setup-go@v5
         with:
           go-version: '1.21'
           cache: false
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3
         with:

cmd/main.go

@@ -27,17 +27,17 @@ func main() {
 	fmt.Println(ok)             // true
 	fmt.Println(root.GetData()) // 0.0
 
-	node, ok := tr.Get(3)
-	fmt.Println(ok)             // true
-	fmt.Println(node.GetData()) // 1.3
+	found, ok := tr.Get(3)
+	fmt.Println(ok)              // true
+	fmt.Println(found.GetData()) // 1.3
 
 	structure, ok := tr.GetStructure()
 	fmt.Println(ok)        // true
 	fmt.Println(structure) // (NULL) -> (0), (0) -> (1),  (1) -> (3),  (1) -> (4),  (0) -> (2),  (2) -> (5),  (2) -> (6)
 
 	nodes, ok := tr.Backtrack(6)
 	fmt.Println(ok) // true
-	for _, node := range nodes {
-		fmt.Println(node.GetData()) // 2.6; 0.2; 0.0
+	for _, n := range nodes {
+		fmt.Println(n.GetData()) // 2.6; 0.2; 0.0
 	}
 }