Fixes linting issues and bump linter version to 1.62.2

Makefile

@@ -48,7 +48,7 @@ install-golangci-lint:
 	@echo "=====> Installing golangci-lint..."
 	@curl -sSfL \
 	 	https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | \
-	 	sh -s -- -b $(GOPATH_BIN) v1.52.2
+	 	sh -s -- -b $(GOPATH_BIN) v1.62.2
 
 lint: install-golangci-lint
 	@$(GO) vet $(GO_PACKAGES)

golangci.yaml

@@ -1,22 +1,22 @@
 linters:
   disable-all: true
   enable:
-  - govet
-  - staticcheck
-  - unused
-  - gosimple
-  - revive
-  - unconvert
-  - goconst
-  - gocyclo
-  - gofmt
-  - goimports
-  - misspell
-  - lll
+    - govet
+    - staticcheck
+    - unused
+    - gosimple
+    - revive
+    - unconvert
+    - goconst
+    - gocyclo
+    - gofmt
+    - goimports
+    - misspell
+    - lll
 
 linters-settings:
   govet:
-    check-shadowing: true
+    shadow: true
 
   errcheck:
     check-type-assertions: true
@@ -41,8 +41,8 @@ linters-settings:
 
   gocyclo:
     min-complexity: 20
-  
+
   revive:
     ignore-generated-header: true
     ignore-patterns:
-      - "_"
+      - "_"

helper/random.go

@@ -9,11 +9,11 @@ import (
 const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
 
 func RandomString(n int) string {
-	rand.Seed(time.Now().UnixNano())
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
 	sb := strings.Builder{}
 	sb.Grow(n)
 	for i := 0; i < n; i++ {
-		sb.WriteByte(charset[rand.Intn(len(charset))])
+		sb.WriteByte(charset[r.Intn(len(charset))])
 	}
 	return sb.String()
 }