Upgrade to go 120 (#523)

.github/workflows/ci.yaml

@@ -27,7 +27,7 @@ jobs:
 
       - uses: azure/setup-helm@5119fcb9089d432beecbf79bb2c7915207344b78 # v3.5
         with:
-          version: v3.9.4
+          version: v3.11.0
 
       - name: Install GoReleaser
         uses: goreleaser/goreleaser-action@f82d6c1c344bcacabba2c841718984797f664a6b # v3.1.0
@@ -111,4 +111,4 @@ jobs:
       - name: golangci-lint
         uses: golangci/golangci-lint-action@08e2f20817b15149a52b5b3ebe7de50aff2ba8c5 # v3
         with:
-          version: v1.48.0
+          version: v1.51.0

.golangci.yml

@@ -1,29 +1,29 @@
 linters:
   enable:
-  - asciicheck
-  - deadcode
-  - depguard
-  - errcheck
-  - errorlint
-  - gofmt
-  - goimports
-  - gosec
-  - gocritic
-  - importas
-  - prealloc
-  - revive
-  - misspell
-  - stylecheck
-  - unconvert
-  - whitespace
+    - asciicheck
+    - depguard
+    - errcheck
+    - errorlint
+    - gofmt
+    - goimports
+    - gosec
+    - gocritic
+    - importas
+    - prealloc
+    - revive
+    - misspell
+    - stylecheck
+    - unconvert
+    - unused
+    - whitespace
 output:
   uniq-by-line: false
 issues:
   exclude-rules:
-  - path: _test\.go
-    linters:
-    - errcheck
-    - gosec
+    - path: _test\.go
+      linters:
+        - errcheck
+        - gosec
   max-issues-per-linter: 0
   max-same-issues: 0
 run:

go.mod

@@ -1,6 +1,6 @@
 module github.com/helm/chart-testing/v3
 
-go 1.19
+go 1.20
 
 require (
 	github.com/MakeNowJust/heredoc v1.0.0

pkg/util/util.go

@@ -51,7 +51,7 @@ func Flatten(items []interface{}) ([]string, error) {
 }
 
 func init() {
-	rand.Seed(time.Now().UnixNano())
+	rand.New(rand.NewSource(time.Now().UnixNano())) // nolint: gosec
 }
 
 func doFlatten(result []string, items interface{}) ([]string, error) {