chore: update CI, dependencies, and linter

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     env:
       GO_VERSION: stable
-      GOLANGCI_LINT_VERSION: v1.55.1
+      GOLANGCI_LINT_VERSION: v1.56.1
       CGO_ENABLED: 0
 
     steps:
@@ -26,7 +26,7 @@ jobs:
 
       # https://github.com/marketplace/actions/setup-go-environment
       - name: Set up Go ${{ env.GO_VERSION }}
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version: ${{ env.GO_VERSION }}
 

.github/workflows/go-cross.yml

@@ -21,7 +21,7 @@ jobs:
 
       # https://github.com/marketplace/actions/setup-go-environment
       - name: Set up Go ${{ matrix.go-version }}
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.go-version }}
 

.golangci.yml

@@ -73,7 +73,7 @@ linters:
 
 issues:
   exclude-use-default: false
-  max-per-linter: 0
+  max-issues-per-linter: 0
   max-same-issues: 0
   exclude: []
   exclude-rules:

go.mod

@@ -4,7 +4,7 @@ go 1.20
 
 require (
 	github.com/stretchr/testify v1.8.4
-	golang.org/x/mod v0.13.0
+	golang.org/x/mod v0.15.0
 )
 
 require (

go.sum

@@ -4,8 +4,8 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-golang.org/x/mod v0.13.0 h1:I/DsJXRlw/8l/0c24sM9yb0T4z9liZTduXvdAWYiysY=
-golang.org/x/mod v0.13.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
+golang.org/x/mod v0.15.0 h1:SernR4v+D55NyBH2QiEQrlBAnj1ECL6AGrA5+dPaMY8=
+golang.org/x/mod v0.15.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

goproxy/auth.go

@@ -1,7 +1,7 @@
 package goproxy
 
 import (
-	"fmt"
+	"errors"
 	"net/http"
 	"time"
 )
@@ -19,7 +19,7 @@ type BasicAuthTransport struct {
 // NewBasicAuthTransport Creates a  new BasicAuthTransport.
 func NewBasicAuthTransport(username, password string) (*BasicAuthTransport, error) {
 	if username == "" || password == "" {
-		return nil, fmt.Errorf("credentials missing")
+		return nil, errors.New("credentials missing")
 	}
 
 	return &BasicAuthTransport{username: username, password: password}, nil

goproxy/client.go

@@ -19,8 +19,6 @@ import (
 const defaultProxyURL = "https://proxy.golang.org"
 
 // VersionInfo is the representation of a version.
-//
-//nolint:musttag // data from Go proxy.
 type VersionInfo struct {
 	Name    string
 	Short   string
@@ -165,6 +163,7 @@ func (c *Client) getInfo(uri string) (*VersionInfo, error) {
 	}
 
 	info := VersionInfo{}
+	//nolint:musttag // data from Go proxy.
 	err = json.NewDecoder(resp.Body).Decode(&info)
 	if err != nil {
 		return nil, err