Enable Go 1.18 in the ci and release workflows

* Enable Go 1.18 in the ci and release workflows

* Fix lint warning

* Add golangci as a make target

cmd/tlsconfig/tls_version.go

@@ -1,7 +1,3 @@
-//go:build go1.14 || !go1.11
-// +build go1.14 !go1.11
-
-// main
 package main
 
 import (

cmd/tlsconfig/tls_version_go12_go13.go

@@ -1,34 +0,0 @@
-//go:build go1.12 && !go1.14
-// +build go1.12,!go1.14
-
-// This file can be removed once go1.13 is no longer supported
-
-package main
-
-import (
-	"crypto/tls"
-	"sort"
-)
-
-func mapTLSVersions(tlsVersions []string) []int {
-	var versions []int
-	for _, tlsVersion := range tlsVersions {
-		switch tlsVersion {
-		case "TLSv1.3":
-			versions = append(versions, tls.VersionTLS13)
-		case "TLSv1.2":
-			versions = append(versions, tls.VersionTLS12)
-		case "TLSv1.1":
-			versions = append(versions, tls.VersionTLS11)
-		case "TLSv1":
-			versions = append(versions, tls.VersionTLS10)
-		case "SSLv3":
-			// unsupported from go1.14
-			versions = append(versions, tls.VersionSSL30)
-		default:
-			continue
-		}
-	}
-	sort.Ints(versions)
-	return versions
-}

cmd/tlsconfig/tlsconfig.go

@@ -1,6 +1,3 @@
-//go:build go1.12
-// +build go1.12
-
 package main
 
 import (
@@ -14,9 +11,10 @@ import (
 	"log"
 	"net/http"
 	"path/filepath"
-	"strings"
 
 	"github.com/mozilla/tls-observatory/constants"
+	"golang.org/x/text/cases"
+	"golang.org/x/text/language"
 )
 
 var (
@@ -82,7 +80,8 @@ func getTLSConfFromURL(url string) (*ServerSideTLSJson, error) {
 }
 
 func getGoCipherConfig(name string, sstls ServerSideTLSJson) (goCipherConfiguration, error) {
-	cipherConf := goCipherConfiguration{Name: strings.Title(name)}
+	caser := cases.Title(language.English)
+	cipherConf := goCipherConfiguration{Name: caser.String(name)}
 	conf, ok := sstls.Configurations[name]
 	if !ok {
 		return cipherConf, fmt.Errorf("TLS configuration '%s' not found", name)