enable hex format

Author: TheFox0x7

.golangci.yml

@@ -87,7 +87,6 @@ linters:
       integer-format: false
       int-conversion: false
       bool-format: false
-      hex-format: false
     staticcheck:
       checks:
         - all

modules/cache/cache.go

@@ -4,6 +4,7 @@
 package cache
 
 import (
+	"encoding/hex"
 	"errors"
 	"fmt"
 	"strconv"
@@ -52,7 +53,7 @@ func Test() (time.Duration, error) {
 		return 0, errors.New("default cache not initialized")
 	}
 
-	testData := fmt.Sprintf("%x", make([]byte, 500))
+	testData := hex.EncodeToString(make([]byte, 500))
 
 	start := time.Now()