update go mod

go.mod

@@ -1,26 +1,9 @@
 module git.zhangdeman.cn/zhangdeman/util
 
-go 1.20
+go 1.21
 
 require (
-	github.com/BurntSushi/toml v1.3.2
-	github.com/Jeffail/gabs v1.4.0
-	github.com/axgle/mahonia v0.0.0-20180208002826-3358181d7394
-	github.com/dgrijalva/jwt-go/v4 v4.0.0-preview1
-	github.com/go-ini/ini v1.67.0
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/mozillazg/go-pinyin v0.20.0
-	github.com/mssola/user_agent v0.6.0
-	github.com/pkg/errors v0.9.1
 	github.com/spaolacci/murmur3 v1.1.0
-	github.com/stretchr/testify v1.8.2
-	github.com/tidwall/gjson v1.17.0
-	gopkg.in/yaml.v3 v3.0.1
-)
-
-require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/tidwall/match v1.1.1 // indirect
-	github.com/tidwall/pretty v1.2.1 // indirect
 )